You can format the memory card.
To format a memory card for the PS Vita system, with the memory card to be formatted inserted in your system, select [Format] > [Format Memory Card]. Follow the on-screen instructions to complete the operation.
- If you format the memory card, all of the data on the memory card will be deleted. This operation cannot be undone, so be sure not to delete any important data by mistake. Deleted data cannot be restored.
- Do not remove the memory card or turn off power to your system during the formatting operation.