UTM Windows Error 0x800700df: The file size exceeds the limit allowed and cannot be saved

Describe the issue When I attempt to copy a large file from the network share folder or the virtual CD/DVD drive, I receive an "Error 0x800700df: The file size exceeds the limit allowed and cannot be saved." I have attempt two known Windows solutions - increasing the "FileSizeLimitInBytes" registry entry for WebClient and ensuring WebClient is running.

Configuration

UTM Version: 2.4.1 (40)
OS Version: Windows 11 ARM 22523.1000, OS Monterey 12.1
Intel or Apple Silicon? Apple Silicon

Mar 23 '22 17:03 BrentS

I'm not sure if something can be done on the UTM side about the WebDAV file size limit. I can only recommend: for large files or professional use, don't use the WebDAV file sharing. Instead, configure your VM to use Bridged Network and make a SMB share in the VM or host.

Mar 23 '22 21:03 conath

Much appreciated! I disabled the SPICE kit sharing feature, connected via the network, and everything works. Thanks!

Mar 23 '22 22:03 BrentS

I was able to copy the file after editing the registry value. afaik, the hard limit for webdav protocol is 4G. it can rarely be reached.

Jun 20 '22 01:06 duhd1993

Worked for me, too. For anyone else wondering, go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters. Change FileSizeLimitInBytes to 0xFFFFFFFF hex or 4294967295 decimal and click OK.

Feb 11 '23 22:02 landonepps

I got the same issue for coping a 2.9GB file, what is the solution?

Apr 17 '23 22:04 asyba

Change FileSizeLimitInBytes to 0xFFFFFFFF hex or 4294967295 decimal and click OK

That worked. Seems to need a restart though.

Jul 25 '23 21:07 tcurdt

Change FileSizeLimitInBytes to 0xFFFFFFFF hex or 4294967295 decimal and click OK

This also worked for me, however, for some reason, the copied and pasted hex value was never accepted by regedit, and I had to use the pasted decimal value instead. I also did a restart afterward.

Sep 08 '23 20:09 DougJoseph

This is not working for me. I tried both decimal and hex, and rebooted the windows 11 box.

Still not allowing large file sharing..

anyone have any thoughts ?

Something else I later figured out, is that the Windows Bitlocker was creating issues, and turning it off helped me. At that time I was trying to install legit software and could not, but turning off Bitlocker helped. I cannot promise it will help with your situation, but worth a try maybe.

Oct 26 '23 17:10 DougJoseph

Still not working, instead I've used the following way:

copy needed files to external USB device or external SSD
just use USB devices to share whole drive
copy needed files
unmount

Apr 21 '24 19:04 the-homeless-god

También funcionó para mí. Para cualquier otra persona que se lo pregunte, vaya a HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters. Cambie FileSizeLimitInBytes a 0xFFFFFFFF hexadecimal o 4294967295 decimal y haga clic en Aceptar.

Eso tambien funciono para mi reinicia mi maquina virtual en una MacBook Pro M1.

May 11 '24 17:05 Nemonsio

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient

Doesn't exist for me.

Aug 19 '24 02:08 9wow

Change FileSizeLimitInBytes to 0xFFFFFFFF hex or 4294967295 decimal and click OK

Works for me with a reset afterwards on M1 Mac. thanks.

Apr 09 '25 14:04 lucea

This registry change should be done by the UTM guest tools installer.

Aug 29 '25 22:08 osy

Loved the USB Drive solution. So simple and powerful.

Nov 15 '25 10:11 pierregermain

@9wow just create a file "webdav_change.reg" with this content

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters]
"FileSizeLimitInBytes"=dword:ffffffff

Dec 10 '25 16:12 Hades32