PiPO Pad-P1 - Manual (Page 38)

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5. Application not workable
Possible reasons may be that this app is not compatible with your OS
or the downloaded .apk file is broken so you may need to download a
full version.
6. How to delete a Google account?
If an account is added, the account is shown in “Accounts & sync” of
“Settings”, where you may also add another account. To delete an
undesired account, go to “Settings” → “Privacy settings” → “Factory
data reset”. Your tablet’s internal storage, downloaded apps, etc. will
also be deleted, except the info in your flash memory. Be careful before
you carry out this operation.
7.USB unmounted, SD card unmounted
Some times after inserting SD card or USB, it will show on the tablet
that “unmounted”, do the factory reset by “setting” – “backup &
factory reset”, and then turn off and turn on tablet once again. If fail,
you have to upgrade the firmware.