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If your microSDXC card is new or doesn't have content you want
to keep, you can also set it up as an extension of the device
storage, and this requires formatting that prevents the
microSDXC card from working with other devices.
CAUTION:
As part of the device storage, the microSDXC card
may have data on it that is necessary for some apps to function
normally. Therefore, do not remove or replace the card randomly.
Setting Up the microSDXC Card as Portable
Storage
When you install a microSDXC card that has not been used in
your phone before, the phone will mount the card as portable
storage by default.
To remove the microSDXC card from your phone:
If you need to remove the microSDXC card as portable storage
while the phone is on, you must unmount it first.
1. Swipe up on the home screen and tap
Settings > Storage
.
2. Tap
the unmount icon next to the card name in the
Portable storage section.
3. When the screen shows that the card is safely ejected, you
can remove it from the phone.
To erase and format the microSDXC card:
1. Swipe up on the home screen and tap
Settings > Storage
.
2. Tap the card name in the Portable storage section.
3. Tap
the icon of 3 vertical dots
> Storage settings
and then
