# Error 0x800700DF when copy big file from mounted snapshot

**URL:** <https://kopia.discourse.group/t/error-0x800700df-when-copy-big-file-from-mounted-snapshot/2930>\
**Category:** Support\
**Created:** [May 23, 2024, 11:42am UTC](https://kopia.discourse.group/t/error-0x800700df-when-copy-big-file-from-mounted-snapshot/2930 "2024-05-23T11:42:17Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Franck](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/franck/32/597_2.png) [@Franck](https://kopia.discourse.group/u/Franck)\
**Post date:** [May 23, 2024, 11:42am UTC](https://kopia.discourse.group/t/error-0x800700df-when-copy-big-file-from-mounted-snapshot/2930/1 "2024-05-23T11:42:17Z")

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Hi,

When I try to mount a snapshot on Windows, I have this error Error 0x800700DF when I try to restore/copy big file \> 50mos.

I saw topics about webdav and try to change the registry settings HKEY\_LOCAL\_MACHINE/SYSTEM/CurrentControlSet/services/WebClient/Parameters and change the FileSizeLimitInBytes but the error still persist.

An idea ?

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**Author:** ![kapitainsky](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/kapitainsky/32/535_2.png) [@kapitainsky](https://kopia.discourse.group/u/kapitainsky)\
**Post date:** [May 23, 2024, 11:58am UTC](https://kopia.discourse.group/t/error-0x800700df-when-copy-big-file-from-mounted-snapshot/2930/2 "2024-05-23T11:58:12Z")

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Do not use webdav mount in Windows to copy large files. It is not kopia but Windows problem. Never worked reliably.

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**Author:** ![Franck](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/franck/32/597_2.png) [@Franck](https://kopia.discourse.group/u/Franck)\
**Post date:** [May 23, 2024, 2:32pm UTC](https://kopia.discourse.group/t/error-0x800700df-when-copy-big-file-from-mounted-snapshot/2930/3 "2024-05-23T14:32:08Z")

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So what to do to recover large files?

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<div class="post-metadata">

**Author:** ![kapitainsky](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/kapitainsky/32/535_2.png) [@kapitainsky](https://kopia.discourse.group/u/kapitainsky)\
**Post date:** [May 23, 2024, 3:33pm UTC](https://kopia.discourse.group/t/error-0x800700df-when-copy-big-file-from-mounted-snapshot/2930/4 "2024-05-23T15:33:00Z")

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Do it directly from a command line - this always works.

> **[restore](https://kopia.io/docs/reference/command-line/common/restore/)**
>
> $ kopia restore Restore a directory or a file.
> Restore can operate in two modes:
> from a snapshot: restoring (possibly shallowly) a specified file or directory from a snapshot into a target path. By default, the target path will be created by the...

Or mount it using different OS than Windows - you can always spin Linux as a VM if needed.

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<div class="post-metadata">

**Author:** ![dimejo](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/dimejo/32/287_2.png) [@dimejo](https://kopia.discourse.group/u/dimejo)\
**Post date:** [May 23, 2024, 8:17pm UTC](https://kopia.discourse.group/t/error-0x800700df-when-copy-big-file-from-mounted-snapshot/2930/5 "2024-05-23T20:17:27Z")

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> [@Franck](#):
>
> So what to do to recover large files?

When browsing snapshots you can restore single files by clicking on the file or you can restore a directory including all files by clicking on the blue “Restore Files & Directories” button next to the green “Mount as Local Filesystem” button. Just tested with a 700MB file without issues.