Hi guys,
The problem with the file system of the PSR E463 is that the keyboard will only see the first 100 style files on the USB stick (sorted by alphabetic order), whatever the number of style files stored on the stick.
Practically, this means that it is best to work with small, cheap USB sticks. No point of having a 64 Gb stick, a 1 or 2 Gb stick will do. On each stick, store 100 style file of a given genre, e.g. pop or jazz.
Another solution is to have the 100 styles you like best on a stick. Of these 100 styles, upload your 10 favorites (or the 10 you need for a given set or an exam) to the keyboard.
Hope this helps,
Vinciane