Total Space
Shows the total memory space of internal storage in your tablet.
Apps
The amount of application data of internal storage.
Downloads
The amount of downloaded data of internal storage.
Pictures, Videos
The amount of picture and video data of internal storage.
Audio (music, ringtones, podcasts etc.)
The amount of audio data of internal storage.
Misc.
The amount of miscellaneous data of internal storage.
Available
Shows the free space of internal storage.

SD card

SD card contains the following options after you insert an SD card.
Unmount SD card
Tap to unmount the SD card for safe removal.

USB storage

USB storage contains the following options depending on the devices that
you have inserted:
Unmount USB0 - Unmount USB7
Tap to unmount the USB memory device for safe removal.

USB computer connection

You can choose how the USB port works by tapping the Menu icon ( )
and select USB computer connection. Please refer to the Connecting to
a computer section for more details.
Battery
Battery allows you to check what is using the battery and the battery
usage data.
Tap to open a list of the applications and operating system components
you have used since you last connected the tablet to a power source,
sorted by the amount of power they have used.
Tap REFRESH on the top of the screen to reload the list.
TOSHIBA AT300SE series
User's Manual 6-9