I have 8gb of memory and my saves would only hang for about 10 seconds when saving.

I didn't change anything and the game just became unplayable.

Not sure if this will help but I checked the event viewer of the crash and got this:
EoCApp.exe
3.0.151.229
59fc616b
VCRUNTIME140.dll
14.0.24215.1
57bfd5ab
c0000005
000000000000c5b3
193c
01d35c1badfdf8cb
C:\Program Files (x86)\Steam\steamapps\common\Divinity Original Sin 2\bin\EoCApp.exe
C:\WINDOWS\SYSTEM32\VCRUNTIME140.dll
bb41f498-19a1-43a3-b2ca-29f3bd5f1928

I think it's attributed to VCRUNTIME140.dll which is in the system 32 folder