I use perforce and/or synctoy for syncing files to my devices, such as e-book readers, mp3 players, etc via USB. Unfortunately I can't use either tool when it comes to most phones and tablets because they show up as devices, not drives. Is there a software that would allow me to setup mappings between folders on my local PC and on the devices, and push files from PC to device? (I am much less likely to pull data back from the devices to the PC). Command line or UI would be ok.