Save your photos and videos to a memory card
If there is a memory card in your phone, and your phone memory is filling up, save the photos 
you take and videos you record to the memory card.
For the best video quality, record videos to your phone memory. If you record videos to the 
memory card, it is recommended that the microSD card you use is a fast 4–128GB card by a
well-known manufacturer. The memory card is not supported by all phones. For availability,
go to www.microsoft.com/mobile/support/wpfeatures.
1. Tap  Storage.
2. Switch Store new photos on my to SD card.
The photos and videos you take from now on are saved to the memory card.
Use only compatible memory cards approved for use with this device. Incompatible cards may 
damage the card and the device and corrupt data stored on the card.
Tip: To move the photos and videos you’ve taken earlier to a memory card, tap File
Explorer.