Photoshop freezing at 99% when saving multi-layer files to PSD

[charistuul]

I did look at the previous similar topic and I did go to file handling and change "recent file list" to 5 from 20. I also went to Edit, Purge, purge all ...

If I merge all layers then save PSD it will save in a fraction of a second. If I attempt to save with multiple layers (even just as few as 3) it will freeze at 99%.  I opened a different file and created just a couple of dupicate layers and attempted to save as PSD. It did the same thing, freezing at 99%. 

I am running a newer I9 system with 64 gig of RAM and multiple terabytes of disk space available.

[D Fosse]

First of all, are you saving directly to an external drive? If you are, save to local disk and copy the saved file over.

https://helpx.adobe.com/photoshop/kb/networks-removable-media-photoshop.html 

Other than that, "If I merge all layers then save PSD it will save in a fraction of a second" points to a problem with layer compositing. Try to uncheck these: