Themisto

I’m on MacOS Tahoe 26.1 (25B78). After digging into this a bit more, it really does look like the issue comes from Tahoe. It seems like SMB3 is misconfigured on the Mac side, which is what’s causing the failures. There are plenty of threads out there showing this happening across different NAS platforms that use SMB for Time Machine. I tried a few of the fixes suggested on the Synology forum, but none of them worked for me. If anyone wants to check it out, here’s the link: https://community.synology.com/enu/forum/1/post/194563

I’m running into the same issues after upgrading to 7.2.0. My old Time Machine backup started throwing an error saying it ran out of space. I went ahead and set up a new one, but even with a fresh backup I’m now getting the message that "the backup disk image could not be created."