Import files from Files
Method 1
- Tap
three dots button on the bottom left of the thumbnails screen. - Tap Add > Import Files...
- Choose image or video files to import.
Method 2
- Open Sidebar.
- Touch and hold the album you want to import files into.
- Tap Import Files...
If you import a folder(filesystem) to an album, all images and videos inside a folder(including subfolders) will be added to the album.
Files cannot be imported into a folder.