To free up space if your device runs slow or crashes/resets, apps freeze when running them, or you can't save media, view this info.
From the Start screen, swipe left to display the Apps list. Alternatively, tap the Right arrow (located in the lower-right; may require scrolling to the bottom of the Start screen).
Tap Settings.
Tap storage sense.
From the "phone" section, tap the Usage bar.
View the free space.
If the phone memory is full, unused items maybe be removed from the device such as: