General Issues

I just got an MPC 1000 and everything worsk pretty well I'm getting arround everything pretty well(similarities with MPC 3000). But when I try to load samples from my Mac computer the MPC gets stuck in the USB screen , it says "Please do not remove the USB conection until the drive icon is removed on PC". And I can't get back to the main screen. Other thins is that in my computer when I drag an item to the usb folder it's telling me that it's full which seems pretty strange cuz on the MPC it's telling me I still have space....

Forget that, I was able to find the solution for the USB issue but not the loading part.