Open Snapchat
Tap your profile icon
Tap the Settings gear icon
Scroll to Memories
Tap Backup Progress
Turn on Auto-Save or Backup
Select Camera Roll if available
Make sure you are connected to Wi-Fi
Keep enough storage available on your device and in Snapchat
Open Memories
Select the Camera Roll tab if shown
Choose the photos or videos you want to back up
Tap Export or Save
Select Snapchat Memories or Camera Roll backup option
Wait for the backup to finish
Check Backup Progress to confirm it is complete