83Plus:Software:msd8x
From WikiTI
msd8x is a TI-84 Plus Flash application which serves as a GUI interface between your calculator's contents and USB mass storage device's contents. Just like usb8x, it only supports the FAT16 file system.
The current release version of msd8x is v0.93, downloadable at radicalsoft.org.
Running msd8x
Attach your USB mass storage device to your USB cable and then to your 84+/SE's USB port. If your flash drive is a common model, msd8x will auto-launch and display directory contents. If not, press the [APPS] key and then select MSD8X from the menu.