"Data" would not be apps. So sure, should be a problem.
Basically, I have a windows 8.1 pro PC with two hard drives. A 320 GB HDD with the windows installed on it and a 2 TB one with lots of important data on it. I also have a Windows 10 Pro PC with a single 1 TB HDD installed (that obviously has windows 10 installed on it) if I took the 2 TB HDD out of my Windows 8.1 Pro PC and put it into my Windows 10 PC, would i be able to access all the data that is already on the 2 TB hard drive from the Windows 10 PC?