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max file size for azure filesync

Stefan Uytterhoeven 0 Reputation points
2026-05-06T11:49:51.8566667+00:00

we're using azure filesync to sync files that are about 10Mb . What is the max size of a file that we can sync?

Azure Storage
Azure Storage

Globally unique resources that provide access to data management services and serve as the parent namespace for the services.

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  1. Q&A Assist
    2026-05-06T11:50:03.6766667+00:00
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    Azure File Sync can sync files up to 100 GiB in size.

    The Azure File Sync scale targets specify a file size limit of 100 GiB; since Azure File Sync uses Azure Files as the backing store, this is the effective maximum per file that can be synced. Files of about 10 MB are well within this limit.

    References:

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  1. Ravi Varma Mudduluru 11,315 Reputation points Microsoft External Staff Moderator
    2026-05-06T12:30:06.7766667+00:00

    Hello @ Stefan Uytterhoeven,

    Thank you for reaching Microsoft Q&A.

    Your 10 MB files are tiny compared to what Azure File Sync can handle. There’s no special per-file cap imposed by the File Sync agent itself; it simply honors whatever limits your Azure Files share supports. In Microsoft’s scalability tests:

    • They’ve successfully synced individual files up to 100 GiB (this is a “soft” tested boundary, not a hard limit).

    • Underlying Azure Files (on a page-blob share) supports single files up to 1 TiB. On premium file shares you can go even higher (share size up to 100 TiB), so individual files can be as large as the share ceiling.

    In short – you’re all set. Your 10 MB files are well below both the 100 GiB tested threshold and the 1 TiB/100 TiB Azure Files limits.

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