Camera has no files on it, but something is taking up 5.2 GB of space.
The Fix
Log into shell with adb
cd into /sdcard/DCIM/
locate hidden files
Use ls -l in both /sdcard/, /sdcard/DCIM/, and /sdcard/DCIM/100RICOH.
Locate for a set of huge files that are video or audio format. In the example below, there are .wav audio files from a failed video recording test.
Delete extra files
The THETA V shell is the Android OS, which uses Linux commands. Asterisk * is a wildcard that matches any character. command to delete all files with a .wav extension is:
rm *.wav
Be careful. You cannot recover the files. If you do not have confidence in your command line ability, ask a friend for help.
The ls command will list the files. I verified that I do not have the files on the shell.
Reboot camera
Press the power off button for longer than 8 seconds. Once the camera is off, start the camera.
Plug camera back in and verify storage
This technique requires that your camera be unlocked in developer mode. It is free to unlock your camera.
The application process does take some time, but you’ll have more camera functionality. There’s no downside to unlock the camera as far as I can tell. It just takes some effort.