A file folder. When I want an album of files (music, pictures, etc.) I create a folder, name it what I want and save my content there.
Almost all the viewers let me look through this folder as an album.
This has worked for me since about DOS 2.1 where we got folders.
Can someone advise/recommend a simple image saving file format that will allow me to create an album of images? Custom re-labelling of pictures. Not enthusiastic about pdf (too much compression). Image editing is NOT required. Not for cloud storage only to USB stick memory.