In my defense, when I first built this PC, I didn't know Trainz would take up as much space as it does. So I thought a 1 TB drive would be all I would need. It also probably doesn't help that I've also got a few Steam games installed on my D drive as well.Yes, definitely increase your RAM. Why only 1 TB drives? 2 TB are inexpensive now. Put your Trainz data on a 2 TB drive and be done with it. You can probably do some drive clean up and optimization too. The Trainz drive can lose the contents of backup folder periodically along with clearing the cache/internet folder. I've seen Trainz backups eat up to 50 GB of space or more if I do a lot of route building, downloads, and repairs.
Hindsight really is 20/20. ^^;