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

Thank you! I'll give it a go.

STEP BY STEP SOLUTION (macOS Catalina V10.15.1)

1. Go to system preference
2. Go to security and privacy
3. Go to privacy tab
4. In the left column go to Full Disk Access
5. Add Adobe Photoshop 2020.app

I'm a designer working with a Macbook Pro (2018), running Photoshop CC 2019 20.0.6 and until Catalina i was able to work just fine.

Yesterday i was saving some of my files and got stuck on 47%. I waited for the evening but it didn't move on so i had to reboot the whole thing. Naturally, my working files were corrupted in the process so i had to start all over again. Oddly enough, even though auto recovery was on as it should be, i didn't find any of my files there.

Today i worked the same stuff again and surprisely it bricked the working files in the saving progress AGAIN. Luckily i was smart enough to export the layers as png:s so i didn't have to start all the way from the beginning again. 

Now i'm afraid of opening any of my files without duplicating them first as i'm pretty sure the saving will fail. What is this all about?

Hello Adam, I've given a go what you suggested and I'm still having the hanging of savings to and external HDD. Saving to internal HDD I'm having no problems.

Spin dump link https://www.dropbox.com/s/rkk1qttvlcqbs9r/spindump.txt?dl=0

Same issues on new MacMini. Re-installed Ps back to v20+ now the same issues are happening and freezing on 99%. I will give storing locally a go.

The problem is DEFINITELY saving to an external, which almost all of us do.  The only answer thus far is to save to your desktop, then copy the file to your normal external.  So long as you do that, you're work can be saved.  To those that are frozen right now, if you crash your computer, it will attempt to make a recovery file.  It is questionable as to when it will have the latest saved version. You may wish to take a screen shot and then be prepared to replicate the work you've done. 

Hi,
Is there something new?
tnx

Hi,
Is there something new?
tnx

I just wish there will be a way to rescue the damaged file. Now my project that I have been working on for a long time is ruined.

ifat — I just opened a PSD that I had saved to desktop that I also saved to an external.  Did a little work and tried to save it directly and it froze at 99%. For now, I'll keep saving to desktop and transferring over.  That's the only successful system for me for now.  Can't keep crashing my computer.