Copy them to a computer or cloud storage (google drive, Apple iCloud, etc..) and copy them to the device using a computer or whatever has the interface to work with whatever "sandisk" thing you have. Sandisk has quite a few products.
Copy them to a computer or cloud storage (google drive, Apple iCloud, etc..) and copy them to the device using a computer or whatever has the interface to work with whatever "sandisk" thing you have. Sandisk has quite a few products.