Do you have your files saved on an SD card? You should format the card while it's in the phone. (Formatting erases everything on the card, so make sure your stuff is saved to your computer first!) The option should be in your settings under memory/media card. This will add the folders so your phone can read the files. Copy your files back to the card, and restart your phone.
Regarding the time to load, the only thing you can do -- besides not turning off your phone -- is keep only the stuff you really need. The phone just doesn't have the power to quickly load a lot of files.
Enjoy your new Jest 2!