Like the title says I need help.

So I have a SeaGate 500gb hard drive hooked up into my PC. And I try recording some gameplay videos with the SeaGate acting as the storage for my videos. It lasts maybe a couple seconds before the recording stops, and the 2nd Hard Drive disappearing on me. I have to restart my PC to be able to access the drive again. Anyone have a solution on how to fix this?

PS: I already have SeaTools installed, it passed all basic tests, etc.