{"id":"data-transfers.why-cant-this-transfer-resume-part-way","url":"/faq/data-transfers/why-cant-this-transfer-resume-part-way","category":{"id":"data-transfers","title":"Data Transfers"},"subcategory":{"id":"downloads","title":"Downloads and large files"},"question":"Why does the log say a transfer can't be resumed part-way?","alt_questions":["This service can't send part of a file","transfer runs in one pass message","Resuming part-way only works when the file is coming down to this Mac","This transfer isn't a single file, so it runs in one pass","why isn't my upload resumable"],"short_answer":"Part-way resume only works for one large file downloading to your Mac from a source that can send partial files. Uploads, cloud-to-cloud transfers, folders and servers that only send whole files run in one pass instead.","answer_markdown":"Resuming part-way only applies to **one large file coming down to your Mac** from a source that can send part of a file. When a transfer doesn't fit, the log explains which case you hit:\n\n- *\"This service can't send part of a file…\"* — the server only sends whole files, so the download runs in one pass.\n- *\"Resuming part-way only works when the file is coming down to this Mac.\"* — uploads and cloud-to-cloud transfers run in one pass.\n- *\"This transfer isn't a single file…\"* — folders don't need it; a rerun just sends what's missing.\n\nNone of these is an error; the transfer still runs. It just means an interruption restarts that one file rather than continuing it.\n\nRelated: [Large downloads that resume](/faq/data-transfers/large-downloads-resume-where-they-left-off)","answer_html":"

Resuming part-way only applies to one large file coming down to your Mac from a source that can send part of a file. When a transfer doesn't fit, the log explains which case you hit:

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None of these is an error; the transfer still runs. It just means an interruption restarts that one file rather than continuing it.

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Related: Large downloads that resume

","answer_text":"Resuming part-way only applies to one large file coming down to your Mac from a source that can send part of a file. When a transfer doesn't fit, the log explains which case you hit:\n\n- \"This service can't send part of a file…\" — the server only sends whole files, so the download runs in one pass.\n- \"Resuming part-way only works when the file is coming down to this Mac.\" — uploads and cloud-to-cloud transfers run in one pass.\n- \"This transfer isn't a single file…\" — folders don't need it; a rerun just sends what's missing.\n\nNone of these is an error; the transfer still runs. It just means an interruption restarts that one file rather than continuing it.\n\nRelated: Large downloads that resume","tags":["resume","log messages","uploads"],"related":[{"id":"data-transfers.large-downloads-resume-where-they-left-off","question":"Do large downloads resume where they left off if they're interrupted?","url":"/faq/data-transfers/large-downloads-resume-where-they-left-off"},{"id":"data-transfers.where-is-the-transfer-log","question":"Where can I see the details or log of a transfer?","url":"/faq/data-transfers/where-is-the-transfer-log"}],"applies_to":"app>=4.16","last_reviewed":"2026-10-01","title":"Why does the log say a transfer can't be resumed part-way? — Storage Studio FAQ","description":"Part-way resume only works for one large file downloading to your Mac from a source that can send partial files. Uploads, cloud-to-cloud transfers, folders and servers that only send whole files run in one pass instead.","crumbs":[{"name":"Home","path":"/"},{"name":"FAQ","path":"/faq/"},{"name":"Data Transfers","path":"/faq/data-transfers/"},{"name":"Why does the log say a transfer can't be resumed part-way?","path":"/faq/data-transfers/why-cant-this-transfer-resume-part-way"}],"jsonld":{"@context":"https://schema.org","@type":"FAQPage","url":"https://storagestudio.us/faq/data-transfers/why-cant-this-transfer-resume-part-way","inLanguage":"en","dateModified":"2026-10-01","mainEntity":[{"@type":"Question","name":"Why does the log say a transfer can't be resumed part-way?","alternateName":["This service can't send part of a file","transfer runs in one pass message","Resuming part-way only works when the file is coming down to this Mac","This transfer isn't a single file, so it runs in one pass","why isn't my upload resumable"],"acceptedAnswer":{"@type":"Answer","text":"Resuming part-way only applies to one large file coming down to your Mac from a source that can send part of a file. When a transfer doesn't fit, the log explains which case you hit:\n\n- \"This service can't send part of a file…\" — the server only sends whole files, so the download runs in one pass.\n- \"Resuming part-way only works when the file is coming down to this Mac.\" — uploads and cloud-to-cloud transfers run in one pass.\n- \"This transfer isn't a single file…\" — folders don't need it; a rerun just sends what's missing.\n\nNone of these is an error; the transfer still runs. It just means an interruption restarts that one file rather than continuing it.\n\nRelated: Large downloads that resume","url":"https://storagestudio.us/faq/data-transfers/why-cant-this-transfer-resume-part-way"}}]},"fragment":"
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Data Transfers · Downloads and large files

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Why does the log say a transfer can't be resumed part-way?

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Short answer: Part-way resume only works for one large file downloading to your Mac from a source that can send partial files. Uploads, cloud-to-cloud transfers, folders and servers that only send whole files run in one pass instead.

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Resuming part-way only applies to one large file coming down to your Mac from a source that can send part of a file. When a transfer doesn't fit, the log explains which case you hit:

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  • "This service can't send part of a file…" — the server only sends whole files, so the download runs in one pass.
  • "Resuming part-way only works when the file is coming down to this Mac." — uploads and cloud-to-cloud transfers run in one pass.
  • "This transfer isn't a single file…" — folders don't need it; a rerun just sends what's missing.
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None of these is an error; the transfer still runs. It just means an interruption restarts that one file rather than continuing it.

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Related: Large downloads that resume

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Applies to Storage Studio 4.16 and later · Last reviewed

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Related questions

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Also available as Markdown and JSON.

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