What drive do you have League saved to?

So, with my pc build, I have a 120 GB SSD boot drive. Well, not solely a boot drive, but I have my OS on it, and a few other things. For the longest time, I've had LoL saved to my SSD, until recently it started filling up for no reason and taking up LOTS of space. Along with the SSD, I have a 2 TB external backup plus for all of my other games, so I figured I would uninstall LoL from my SSD and re-install it to my external. The point I'm trying to get to is that I'm noticing some weird things with my client and in game performance. For example, I minimized LoL, came back about 10 minutes later and half of the client was cut off, and I had to exit and re-open. While in game, every now and then I get small frame rate lag (maybe once every 10 minutes). The fps lag spike is extremely fast, but noticeable. So I guess my question is, what drive do you guys have your League saved to? Do you guys experience anything like this and should I re-install it back to my SSD? Just something that kind of bothers me.