So I'm not sure if I have a Data transfer rate problem with my drive, or if it is a steam issue or something else. I can tell you that I once had a conversation with Steam Support and they advised against running Steam games off an external drive and actually stated they would not provide support for any game being run off an external hdd. I have spent a good amount of time reading posts here and other places and there does not seem to be any consensus as to the advisability of running X Plane 11 from an external drive. I'm still playing DCS off the external drive with no problems. X plane ran fine on my C drive before so I moved it back and now everything seems to run fine. I lowered graphics settings and enabled Vsync, but that did not help. I looked at frame rates and they were bouncing all over the place.

I noticed that I started to get a lot of jitter and lag running X Plane 11.I run with stock scenery and only have a couple of plugins.

I recently purchased a Western Digital My Book external hdd usb 3.0 in order to move my steam games from my C drive.

External hard drive steam