So I have this frustrating issue on my Mac which is running MacOS Big Sur 11.2.3 and the latest version of Box Drive. It seems to only be affecting Photoshop CC. I can save a file once to Box drive from Photoshop and it's fine but I can't make any edit to that file and save it twice. It will come up with this error below. The only way to work around this I found is to save to the desktop instead and then copy it onto Box Drive afterwards which isn’t ideal. Each time this error message happens as well Photoshop seems to save the file into the requested location but the file name is a series of long numbers instead of the correct file name. I have found that restarting seems to fix the issue for a while but after a few hours it always comes back.
Any help would be greatly appreciated. Thanks!