2012 Macbook Pro - I think the minimum for Windows 10 64 bit is around 32-40. I need to use it for Windows Explorer, to upload photos and fill out forms online. I’ll have the photos on an external drive so I can use them (the same batch group) on both Mac and Windows. I don’t need to install a lot of programs or store any files on the Windows partition. I just want to get in, do a few quick jobs, and get back into Mac ASAP. I’ve done some research, I think 60 gb should be plenty, but if I can get away with less, and have everything still work OK, that would be fine. I’ve had to turn off Filevault to partition before I can proceed, which I found is going to take awhile, good thing I guess, more time to make sure I know what I’m doing. Appreciate the advice on partition size.