by AverageJoe » Thu Aug 20, 2015 1:38 am
From my experience, you can move the WoW folder anywhere you like and still run it without problem. Just find the folder labeled "World of Warcraft Classic," cut it, and paste in whichever folder you want to move it to. You can keep it in the default install directory (C:\), or move it to another letter drive/external hard drive (E.g.: E:\), or even move it onto a flash drive if it's big enough.
Ages ago I moved my WoW folder to my external hard drive and my wife currently plays using a 16 GB flash drive. The only thing I can think of is you might break your shortcut files that point to where the game was originally installed, but as long as you open from the WoW.exe or create new shortcuts, you should be fine.