P: Doesn't save files to external drive formatted for ExFat - macOS 10.15 Catalina

Yes me too.  It is only photoshop, not the other creative cloud products I use or any other software.  And same issue that I have to force quit photoshop and then restart my computer in order to open it again.  And the file is lost.  

Having the same issue here with Photoshop -- probably 30% of the time I go to save a file, it will stall at a random percentage. No error from macOS or Adobe or crash dialog/reporting option. Only solution so far has been to force quit the app, after which I can't reopen the program until I reboot my Macbook. It kills my reboot function -- have to press the power button for a hard off/on, and then the file in question is now corrupted. Completely destroying my productivity. 

Very similar problem here. My tif files don't complete the saving progress, crash lightroom and photoshop, and needs a reboot to use the two programs again. File is useable once I restart but loses all layer info and flattens with adjustment layers applied. It's occasional in my case. Russian roulette-ish.

Photoshop/Lightroom: Tif files with layers not completing the saving progress, crashing on macOS 10.15 Catalina

I'm having the same issue. When saving a PSD file it just stops at a random percentage of progress and the file becomes unusable.

I hope Adobe will fix this. I already lost a lot of time and effort because of this problem. Wish I didn't upgrade to Catalina and CC 2019.

Unfortunately the PS is the main problem probably 😞 Because the Catalina is ok while I'm not using Adobe. Thank you Jeffrey, if you hear some information about that problem I'd be grateful if you couldI write a message.

Sounds like something more serious. If Catalina is crashing, that sounds like either a damaged OS install or a failing hard disk.

Hi. Thanks your comment but the problem is not the extension. The problem is the saving method. When I start saving the file, PS crashes. And after that I have to reinstall the app but the file is crashed and I can’t use it anymore. By the way the Catalina crashes too...

What is the exact error you are seeing? Are you saving the file with the wrong extension? See: https://helpx.adobe.com/photoshop/kb/photoshop-and-macos-catalina.html#Filenamingoptionsdontworkcorr...