{"id":"external-drives.what-do-looks-good-warnings-and-not-suitable-mean","url":"/faq/external-drives/what-do-looks-good-warnings-and-not-suitable-mean","category":{"id":"external-drives","title":"External drives"},"subcategory":{"id":"setting-up","title":"Setting up your drive"},"question":"What do \"looks good\", \"usable with warnings\" and \"not suitable\" mean in Choose Drive?","alt_questions":["Choose Drive compatibility verdict meaning","Why is my drive marked not suitable?","What does usable with warnings mean?","drive verdict colours storage studio","Why is the Use This Drive button greyed out?","What makes a drive compatible with Storage Studio?"],"short_answer":"Looks good means a Mac-formatted external drive. Usable with warnings means it works but isn't ideal (for example exFAT) and you confirm with Use Anyway. Not suitable — internal, network or FAT32 drives — can't be selected.","answer_markdown":"They're the compatibility verdict for the selected drive, with the specific reasons listed underneath.\n\n- **Looks good** (green) — a Mac-formatted (APFS or Mac OS Extended) external drive.\n- **Usable with warnings** (orange) — it will work, but something isn't ideal, such as exFAT or another non-Mac format. You can still use it; the confirmation calls the warnings out and asks you to **Use Anyway**.\n- **Not suitable** (red) — internal drives, network drives and older Windows formats such as FAT32. **Use This Drive** stays disabled.\n\nThe speed test adds its own verdict: a drive that's too slow is blocked, a slow one gets a warning.","answer_html":"

They're the compatibility verdict for the selected drive, with the specific reasons listed underneath.

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The speed test adds its own verdict: a drive that's too slow is blocked, a slow one gets a warning.

","answer_text":"They're the compatibility verdict for the selected drive, with the specific reasons listed underneath.\n\n- Looks good (green) — a Mac-formatted (APFS or Mac OS Extended) external drive.\n- Usable with warnings (orange) — it will work, but something isn't ideal, such as exFAT or another non-Mac format. You can still use it; the confirmation calls the warnings out and asks you to Use Anyway.\n- Not suitable (red) — internal drives, network drives and older Windows formats such as FAT32. Use This Drive stays disabled.\n\nThe speed test adds its own verdict: a drive that's too slow is blocked, a slow one gets a warning.","tags":["compatibility","verdict","choose drive"],"related":[{"id":"external-drives.how-do-i-set-up-my-external-drive","question":"How do I set up my external drive in Storage Studio?","url":"/faq/external-drives/how-do-i-set-up-my-external-drive"},{"id":"external-drives.how-does-the-drive-speed-test-work","question":"How does the drive speed test in Storage Studio work?","url":"/faq/external-drives/how-does-the-drive-speed-test-work"},{"id":"external-drives.can-i-change-my-drive-with-choose-drive-later","question":"Why can't I find Choose Drive any more?","url":"/faq/external-drives/can-i-change-my-drive-with-choose-drive-later"}],"applies_to":"all","last_reviewed":"2026-10-01","title":"What do \"looks good\", \"usable with warnings\" and \"not suitable\" mean in Choose Drive? — Storage Studio FAQ","description":"Looks good means a Mac-formatted external drive. Usable with warnings means it works but isn't ideal (for example exFAT) and you confirm with Use Anyway. Not suitable — internal, network or FAT32 drives — can't be selected.","crumbs":[{"name":"Home","path":"/"},{"name":"FAQ","path":"/faq/"},{"name":"External drives","path":"/faq/external-drives/"},{"name":"What do \"looks good\", \"usable with warnings\" and \"not suitable\" mean in Choose Drive?","path":"/faq/external-drives/what-do-looks-good-warnings-and-not-suitable-mean"}],"jsonld":{"@context":"https://schema.org","@type":"FAQPage","url":"https://storagestudio.us/faq/external-drives/what-do-looks-good-warnings-and-not-suitable-mean","inLanguage":"en","dateModified":"2026-10-01","mainEntity":[{"@type":"Question","name":"What do \"looks good\", \"usable with warnings\" and \"not suitable\" mean in Choose Drive?","alternateName":["Choose Drive compatibility verdict meaning","Why is my drive marked not suitable?","What does usable with warnings mean?","drive verdict colours storage studio","Why is the Use This Drive button greyed out?","What makes a drive compatible with Storage Studio?"],"acceptedAnswer":{"@type":"Answer","text":"They're the compatibility verdict for the selected drive, with the specific reasons listed underneath.\n\n- Looks good (green) — a Mac-formatted (APFS or Mac OS Extended) external drive.\n- Usable with warnings (orange) — it will work, but something isn't ideal, such as exFAT or another non-Mac format. You can still use it; the confirmation calls the warnings out and asks you to Use Anyway.\n- Not suitable (red) — internal drives, network drives and older Windows formats such as FAT32. Use This Drive stays disabled.\n\nThe speed test adds its own verdict: a drive that's too slow is blocked, a slow one gets a warning.","url":"https://storagestudio.us/faq/external-drives/what-do-looks-good-warnings-and-not-suitable-mean"}}]},"fragment":"
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External drives · Setting up your drive

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What do "looks good", "usable with warnings" and "not suitable" mean in Choose Drive?

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Short answer: Looks good means a Mac-formatted external drive. Usable with warnings means it works but isn't ideal (for example exFAT) and you confirm with Use Anyway. Not suitable — internal, network or FAT32 drives — can't be selected.

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They're the compatibility verdict for the selected drive, with the specific reasons listed underneath.

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  • Looks good (green) — a Mac-formatted (APFS or Mac OS Extended) external drive.
  • Usable with warnings (orange) — it will work, but something isn't ideal, such as exFAT or another non-Mac format. You can still use it; the confirmation calls the warnings out and asks you to Use Anyway.
  • Not suitable (red) — internal drives, network drives and older Windows formats such as FAT32. Use This Drive stays disabled.
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The speed test adds its own verdict: a drive that's too slow is blocked, a slow one gets a warning.

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Last reviewed

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