Before you can start installing new custom ROMs or doing things to your Transformer Prime out of ordinary, I HIGHLY ADVISE you to make at least one backup of your current ROM.
Backing up a whole ROM pretty much backups up EVERYTHING including your apps, settings, ROM, and kernel except the contents of your internal storage.
Step 1. First, hold down Volume Down and Power button together for about 10 seconds until you see the white letters appear at the top left of your screen. When you see that, immediately let go of both buttons and press Volume Up button to ClockworkMod Recovery.
Step 2. Once in ClockworkMod Recovery, choose “backup and restore”.
Step 3. Next choose “backup”.
Step 4. This will start the backup process.
Step 5. Once it’s done, your backups are automatically timestamped and stored in your internal storage under the directory /clockworkmod/backup. You are free to move this directory to your computer hard disk to save space and later copy it back to the same directory when you want to restore ROM. You can also change the timestamped directory names to something more meaningful.
Step 6. To restore, simply get into the same “backup and restore” menu then choose “restore”.
Step 7. You will find all your backup folders timestamped. Choose the folder you want to restore and it will start restoring your ROM.
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