I installed one on my Yamaha psr 1000 about 5 years ago, works great!
There are videos on you tube on this. I was going to put one on my old korg i5 s but the cable connectors are not pc like Yamaha which is 30 pins. You should get software to partition the USB drive into 99 1.44 mb sections with the emulator drive. Each one is like a floppy except all on one USB flash drive. No problems with it thru all the years I've had it. Make sure it's compatible for what ever model keyboard you are going to install it in.