When you insert a storage card that has not been used on
HTC Desire 12+ before, the card will be mounted as removable storage by default.
If the storage card is new or doesn't have content you want to keep, you can format the storage card to use it as internal storage for
HTC Desire 12+.
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From the
Home screen, swipe up and then tap
.
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Under
Portable storage, tap the name of your storage card.
-
Tap
.
-
Tap
Format as internal, and then tap
Erase & format.
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Follow the onscreen instructions to move your installed apps and their data from the phone storage to the storage card.