Seeing those files on there like ClockWorkMod and Titanium Backup tells me the device is rooted.
ClockWorkMod would be associated with your custom recovery and from the size of it probably has at least 1 maybe 2 or more full backups saved.
TitaniumBackup, appears also to have some apps/data backup's saved.
If your not worried about keeping those backups then go ahead and remove them. Maybe transfer them off to your computer first to have just incase...
The rest are self explanatory. MP3 downloads , Album (Pics) ..