{ "schema": "https://storagestudio.us/schema/wiki-page.v1", "title": "Where did my space go?", "slug": "where-did-my-space-go", "url": "https://storagestudio.us/wiki/where-did-my-space-go", "markdown_url": "https://storagestudio.us/wiki/where-did-my-space-go.md", "category": "Freeing up space", "category_url": "https://storagestudio.us/wiki/freeing-up-space/", "tags": [ "free up space", "storage watch", "storage charts", "local snapshots" ], "summary": "Storage Studio watches your free space all the time. When it falls quickly it works out which app or folder took it, warns you if you're heading for a full disk, and explains any stretch of the storage chart you select.", "published_at": "2026-10-01T06:20:20.000Z", "updated_at": "2026-10-01T05:34:40.000Z", "headings": [ { "level": 2, "text": "The watch in the background", "id": "the-watch-in-the-background" }, { "level": 2, "text": "When you're told, and when you aren't", "id": "when-you-re-told-and-when-you-aren-t" }, { "level": 2, "text": "When the space is held, not lost", "id": "when-the-space-is-held-not-lost" }, { "level": 2, "text": "Asking about any period", "id": "asking-about-any-period" } ], "links_out": [ { "slug": "glossary-local-snapshot", "label": "local snapshots", "exists": true, "url": "https://storagestudio.us/wiki/glossary-local-snapshot" }, { "slug": "why-deleting-doesnt-free-space", "label": "Why deleting files doesn't always give the space back", "exists": true, "url": "https://storagestudio.us/wiki/why-deleting-doesnt-free-space" }, { "slug": "storage-charts", "label": "Storage charts and history", "exists": true, "url": "https://storagestudio.us/wiki/storage-charts" }, { "slug": "storage-inspector", "label": "Storage Inspector", "exists": true, "url": "https://storagestudio.us/wiki/storage-inspector" }, { "slug": "emergency-space", "label": "Emergency Space", "exists": true, "url": "https://storagestudio.us/wiki/emergency-space" }, { "slug": "background-activity", "label": "Background Activity and Job Insights", "exists": true, "url": "https://storagestudio.us/wiki/background-activity" }, { "slug": "local-snapshots", "label": "Local snapshots", "exists": true, "url": "https://storagestudio.us/wiki/local-snapshots" } ], "links_in": [ { "slug": "background-activity", "title": "Background Activity and Job Insights", "url": "https://storagestudio.us/wiki/background-activity" }, { "slug": "glossary-built-in-disk", "title": "Built-in disk", "url": "https://storagestudio.us/wiki/glossary-built-in-disk" }, { "slug": "emergency-space", "title": "Emergency Space: when the disk is full right now", "url": "https://storagestudio.us/wiki/emergency-space" }, { "slug": "freeing-up-space-overview", "title": "Freeing up space: the options", "url": "https://storagestudio.us/wiki/freeing-up-space-overview" }, { "slug": "space-didnt-come-back-after-a-move", "title": "I moved files but my free space didn't go up", "url": "https://storagestudio.us/wiki/space-didnt-come-back-after-a-move" }, { "slug": "storage-inspector", "title": "Storage Inspector", "url": "https://storagestudio.us/wiki/storage-inspector" }, { "slug": "compared-with-macos-storage-settings", "title": "Storage Studio and macOS Storage settings", "url": "https://storagestudio.us/wiki/compared-with-macos-storage-settings" }, { "slug": "storage-charts", "title": "Storage charts and history", "url": "https://storagestudio.us/wiki/storage-charts" }, { "slug": "temporary-files", "title": "Temporary files you can't see", "url": "https://storagestudio.us/wiki/temporary-files" }, { "slug": "the-trash", "title": "The Trash and the space it holds", "url": "https://storagestudio.us/wiki/the-trash" }, { "slug": "what-storage-studio-does", "title": "What Storage Studio does", "url": "https://storagestudio.us/wiki/what-storage-studio-does" }, { "slug": "where-to-start", "title": "Where to start: pick your goal", "url": "https://storagestudio.us/wiki/where-to-start" }, { "slug": "why-deleting-doesnt-free-space", "title": "Why deleting files doesn't always give the space back", "url": "https://storagestudio.us/wiki/why-deleting-doesnt-free-space" }, { "slug": "storage-profile", "title": "Your Storage Profile", "url": "https://storagestudio.us/wiki/storage-profile" } ], "diagrams": [ { "kind": "flowchart", "caption": "From a drop in free space to a notice", "outline": "- Free space checked every 30 seconds\n - leads to Did it fall fast?\n- Did it fall fast?\n - No: leads to Free space checked every 30 seconds\n - Yes: leads to Find which apps and folders grew\n- Find which apps and folders grew\n - leads to Was it Storage Studio's own work?\n- Was it Storage Studio's own work?\n - Yes: leads to Noted in Job Insights only\n - No: leads to Is the space held by automatic backups?\n- Is the space held by automatic backups?\n - Yes: leads to Explained, with Release that space\n - No: leads to Will the disk fill within about a week at this rate?\n- Will the disk fill within about a week at this rate?\n - Yes: leads to Notification naming the cause\n - No: leads to Recorded quietly for later\n", "source": "%% caption: From a drop in free space to a notice\nflowchart TD\n A[Free space checked every 30 seconds] --> B{Did it fall fast?}\n B -->|No| A\n B -->|Yes| C[Find which apps and folders grew]\n C --> D{Was it Storage Studio's own work?}\n D -->|Yes| E[Noted in Job Insights only]\n D -->|No| F{Is the space held by automatic backups?}\n F -->|Yes| G[Explained, with Release that space]\n F -->|No| H{Will the disk fill within about a week at this rate?}\n H -->|Yes| I[Notification naming the cause]\n H -->|No| J[Recorded quietly for later]" } ], "images": [], "screenshots_pending": [ { "alt": "The Storage Profile window in Demo Mode scrolled to \"Free space over time\", with a drop on the chart selected and the \"What changed in this period\" breakdown underneath", "caption": "Explaining a drop on the storage chart" } ], "faqs": [ { "question": "What's the best app to free up space on a Mac?", "answer": "If you want space back without losing files, the best approach is \"move, don't delete.\" Storage Studio relocates big apps and folders to an external drive (with a shortcut left in place so they still open), reclaims space macOS is holding in old snapshots, and keeps cloud files online-only — all…", "url": "https://storagestudio.us/faq" }, { "question": "How do I free up space on my Mac?", "answer": "Empty the Trash, clear app caches, remove old downloads, and move large apps and folders you rarely use to an external drive. Storage Studio does all of this in one tap with Tuhi — it clears caches and rarely-used files, reclaims old local backups, and keeps cloud files online-only, previewed…", "url": "https://storagestudio.us/faq" }, { "question": "How do I get more storage on my Mac without deleting my files?", "answer": "Pair your Mac with an external SSD and offload what you don't need on the startup disk. Storage Studio moves large apps, folders, and media to the external drive and leaves a shortcut in the original spot, so you reclaim space while keeping every file — nothing is deleted.", "url": "https://storagestudio.us/faq" }, { "question": "Is it safe to clear the cache on a Mac?", "answer": "Yes — app caches rebuild automatically, so clearing them safely reclaims space; the only risk is deleting the wrong thing by hand. Storage Studio clears only known-safe caches and rarely-used files, shows a preview first, and never touches your personal files without asking.", "url": "https://storagestudio.us/faq" } ], "text": "Storage Studio keeps an eye on your free space all the time, so when it drops you can find out why. If space falls quickly, it works out which app or folder grew and warns you when you're on course to run out. And for any stretch of time on your storage chart, it can list what changed, biggest first. The watch in the background Every 30 seconds, Storage Studio checks how much free space your Mac has. This is a single quick reading: it doesn't scan your disk and costs almost nothing. Only when free space falls fast does it look further: A sudden drop : 5 GB or more within 15 minutes. A steady drain : 20 GB or more within 3 hours. When either happens, Storage Studio measures the likely places once to find what grew, and keeps a record of it. From a drop in free space to a notice Flowchart outline: From a drop in free space to a notice Free space checked every 30 seconds leads to Did it fall fast? Did it fall fast? No: leads to Free space checked every 30 seconds Yes: leads to Find which apps and folders grew Find which apps and folders grew leads to Was it Storage Studio's own work? Was it Storage Studio's own work? Yes: leads to Noted in Job Insights only No: leads to Is the space held by automatic backups? Is the space held by automatic backups? Yes: leads to Explained, with Release that space No: leads to Will the disk fill within about a week at this rate? Will the disk fill within about a week at this rate? Yes: leads to Notification naming the cause No: leads to Recorded quietly for later When you're told, and when you aren't Storage Studio tries hard not to cry wolf. A big drop on a Mac with lots of room left isn't a problem, so you're only interrupted when the rate means you could run out of space in about a week or less. Very short bursts are recorded but never interrupt you on their own. The notice says how fast the space went, what the biggest change was, and roughly how many days of room you have left at that rate. Everything else is still recorded, so you can look it up later in Job Insights under Storage watch , and on the storage chart. A drop caused by Storage Studio's own work (a move in progress, for example) is noted there as Free space dropped while Storage Studio was working. That was us. Each problem is reported once. Further growth from the same place updates the same notice rather than adding new ones, and a place that's already been reported won't be reported again for 6 hours unless it grows by much more than before. When the space is held, not lost Often the space hasn't really gone. After files are moved or deleted, your Mac keeps them in its automatic backups ( local snapshots ) for a while, so free space can drop even though nothing new was written. When that's the cause, the notice says so: Your free space will come back on its own. When the space held is large enough, the notice carries a Release that space button, which asks your Mac to let that space go. Releasing it doesn't delete anything you still have. Your Mac decides how much it lets go of, so you're told afterwards exactly what came back, including when it kept hold of the space for now. See Why deleting files doesn't always give the space back . Asking about any period Open the More menu (•••) → Where Did My Space Go… . It opens your Storage Profile , where the Free space over time chart sits under Your storage over time . Pick a range, or drag across part of the chart, and the panel underneath explains What changed in this period : each app or place that gained or lost space, biggest first, named in plain words; the space your Mac is holding in automatic backups, as its own line, with Review and release… , which lists those backups first and then offers Release space ; a Not accounted for line when Storage Studio can't explain part of the change, rather than guessing. Most lines carry a button to the screen that deals with them, such as Show me or Free up space . The Trash line offers Open Trash , because emptying it can't be undone and is yours to do. If a period can't be explained because no reading was taken back then, Measure now records where your space is today so that later periods can be. Common questions What's the best app to free up space on a Mac? If you want space back without losing files, the best approach is \"move, don't delete.\" Storage Studio relocates big apps and folders to an external drive (with a shortcut left in place so they still open), reclaims space macOS is holding in old snapshots, and keeps cloud files online-only — all… How do I free up space on my Mac? Empty the Trash, clear app caches, remove old downloads, and move large apps and folders you rarely use to an external drive. Storage Studio does all of this in one tap with Tuhi — it clears caches and rarely-used files, reclaims old local backups, and keeps cloud files online-only, previewed… How do I get more storage on my Mac without deleting my files? Pair your Mac with an external SSD and offload what you don't need on the startup disk. Storage Studio moves large apps, folders, and media to the external drive and leaves a shortcut in the original spot, so you reclaim space while keeping every file — nothing is deleted. Is it safe to clear the cache on a Mac? Yes — app caches rebuild automatically, so clearing them safely reclaims space; the only risk is deleting the wrong thing by hand. Storage Studio clears only known-safe caches and rarely-used files, shows a preview first, and never touches your personal files without asking. See also: Storage charts and history · Storage Inspector · Emergency Space · Background Activity and Job Insights · Local snapshots", "markdown": "Storage Studio keeps an eye on your free space all the time, so when it drops you can find out why. If space falls quickly, it works out which app or folder grew and warns you when you're on course to run out. And for any stretch of time on your storage chart, it can list what changed, biggest first.\n\n## The watch in the background\n\nEvery 30 seconds, Storage Studio checks how much free space your Mac has. This is a single quick reading: it doesn't scan your disk and costs almost nothing. Only when free space falls fast does it look further:\n\n- **A sudden drop**: 5 GB or more within 15 minutes.\n- **A steady drain**: 20 GB or more within 3 hours.\n\nWhen either happens, Storage Studio measures the likely places once to find what grew, and keeps a record of it.\n\n```mermaid\n%% caption: From a drop in free space to a notice\nflowchart TD\n A[Free space checked every 30 seconds] --> B{Did it fall fast?}\n B -->|No| A\n B -->|Yes| C[Find which apps and folders grew]\n C --> D{Was it Storage Studio's own work?}\n D -->|Yes| E[Noted in Job Insights only]\n D -->|No| F{Is the space held by automatic backups?}\n F -->|Yes| G[Explained, with Release that space]\n F -->|No| H{Will the disk fill within about a week at this rate?}\n H -->|Yes| I[Notification naming the cause]\n H -->|No| J[Recorded quietly for later]\n```\n\n*Flowchart — From a drop in free space to a notice. Outline:*\n\n- Free space checked every 30 seconds\n - leads to Did it fall fast?\n- Did it fall fast?\n - No: leads to Free space checked every 30 seconds\n - Yes: leads to Find which apps and folders grew\n- Find which apps and folders grew\n - leads to Was it Storage Studio's own work?\n- Was it Storage Studio's own work?\n - Yes: leads to Noted in Job Insights only\n - No: leads to Is the space held by automatic backups?\n- Is the space held by automatic backups?\n - Yes: leads to Explained, with Release that space\n - No: leads to Will the disk fill within about a week at this rate?\n- Will the disk fill within about a week at this rate?\n - Yes: leads to Notification naming the cause\n - No: leads to Recorded quietly for later\n\n## When you're told, and when you aren't\n\nStorage Studio tries hard not to cry wolf. A big drop on a Mac with lots of room left isn't a problem, so you're only interrupted when the rate means you could run out of space in about a week or less. Very short bursts are recorded but never interrupt you on their own. The notice says how fast the space went, what the biggest change was, and roughly how many days of room you have left at that rate.\n\nEverything else is still recorded, so you can look it up later in **Job Insights** under **Storage watch**, and on the storage chart. A drop caused by Storage Studio's own work (a move in progress, for example) is noted there as *Free space dropped while Storage Studio was working. That was us.*\n\nEach problem is reported once. Further growth from the same place updates the same notice rather than adding new ones, and a place that's already been reported won't be reported again for 6 hours unless it grows by much more than before.\n\n## When the space is held, not lost\n\nOften the space hasn't really gone. After files are moved or deleted, your Mac keeps them in its automatic backups ([local snapshots](https://storagestudio.us/wiki/glossary-local-snapshot)) for a while, so free space can drop even though nothing new was written. When that's the cause, the notice says so: *Your free space will come back on its own.* When the space held is large enough, the notice carries a **Release that space** button, which asks your Mac to let that space go. Releasing it doesn't delete anything you still have. Your Mac decides how much it lets go of, so you're told afterwards exactly what came back, including when it kept hold of the space for now. See [Why deleting files doesn't always give the space back](https://storagestudio.us/wiki/why-deleting-doesnt-free-space).\n\n## Asking about any period\n\nOpen the More menu (•••) → **Where Did My Space Go…**. It opens your **Storage Profile**, where the **Free space over time** chart sits under **Your storage over time**. Pick a range, or drag across part of the chart, and the panel underneath explains **What changed in this period**:\n\n- each app or place that gained or lost space, biggest first, named in plain words;\n- the space your Mac is holding in automatic backups, as its own line, with **Review and release…**, which lists those backups first and then offers **Release space**;\n- a **Not accounted for** line when Storage Studio can't explain part of the change, rather than guessing.\n\nMost lines carry a button to the screen that deals with them, such as **Show me** or **Free up space**. The Trash line offers **Open Trash**, because emptying it can't be undone and is yours to do. If a period can't be explained because no reading was taken back then, **Measure now** records where your space is today so that later periods can be.\n\n- **What's the best app to free up space on a Mac?** If you want space back without losing files, the best approach is \"move, don't delete.\" Storage Studio relocates big apps and folders to an external drive (with a shortcut left in place so they still open), reclaims space macOS is holding in old snapshots, and keeps cloud files online-only — all… (https://storagestudio.us/faq)\n- **How do I free up space on my Mac?** Empty the Trash, clear app caches, remove old downloads, and move large apps and folders you rarely use to an external drive. Storage Studio does all of this in one tap with Tuhi — it clears caches and rarely-used files, reclaims old local backups, and keeps cloud files online-only, previewed… (https://storagestudio.us/faq)\n- **How do I get more storage on my Mac without deleting my files?** Pair your Mac with an external SSD and offload what you don't need on the startup disk. Storage Studio moves large apps, folders, and media to the external drive and leaves a shortcut in the original spot, so you reclaim space while keeping every file — nothing is deleted. (https://storagestudio.us/faq)\n- **Is it safe to clear the cache on a Mac?** Yes — app caches rebuild automatically, so clearing them safely reclaims space; the only risk is deleting the wrong thing by hand. Storage Studio clears only known-safe caches and rarely-used files, shows a preview first, and never touches your personal files without asking. (https://storagestudio.us/faq)\n\nSee also: [Storage charts and history](https://storagestudio.us/wiki/storage-charts) · [Storage Inspector](https://storagestudio.us/wiki/storage-inspector) · [Emergency Space](https://storagestudio.us/wiki/emergency-space) · [Background Activity and Job Insights](https://storagestudio.us/wiki/background-activity) · [Local snapshots](https://storagestudio.us/wiki/local-snapshots)\n" }