My Studio V/Rocco had problems just REBUILDING the freaking database with my 64gb microSD card. Everytime I turned it on, it stayed at the "rebuilding" (or whatever) screen for MORE THAN 10 MINUTES (totally unacceptable of course). Random crashes too and since it seems I have too many files, the player crapped out. I even deleted ALL my album covers, "fixed" my tags just in case (using a guide "Lee" created), etc.
$300 and THAT?!?!
UNACCEPTABLE!! My cheapo Sansa and Cowon NEVER took longer than 1 minute booting up and/or rebuilding the libraries (and mind you, the C2 does that every time you turn it on too!).
So, maybe you don't have 50gb+ o files varying in MP3s, WAVs, FLACs, etc. and maybe you don't see other issues others have had and if so, GOOD FOR YOU! For those of us with problems well, we are definitely going to be vocal about it.