"...not a valid Photoshop document" error when opening older layered PSD file
I've encountered this twice now with .psd files created 2 years ago on Dropbox in a shared folder. The work around is for someone else on a different computer to open the psd in an older version of Photshop, and resave it with a different name (adding a v2) and then it opens smoothly on my end.
I am running OS 12.4 on an M1 laptop, with Photoshop 28.3.2
My finder displays the preview thumbnail. The file shows "weight" in MB; in that dropbox has downloaded it locally. It was not a .tiff mistakenly saved with a .psd extension.
Unfortunately when I asked the remote person to tell me what older version of photoshop she had, it updated, and she has no idea what it was.
