what is the best HDD for XBONE?

I ran out of space and need a external, but i want to get one that actually is legit. What ones have you guys bought and how are they?

I've got the 1TB HGST Touro 7200RPM drive... and it's great. Definitely see an improvement in loading times with most games.

4TB western digital.

Would recommend.

Got me a 2 TB Western Digital Passport.

Got a 5TB Seagate and lovin it.

@raugutcon: This is why I try to stay away from Seagate.

Also have the 5TB seagate and it is amazing!