You only need to log in once on this phone.
Photos and videos
Use the Immich app for photos and videos. Your guide shows how.
Other files
Choose a folder (for example your memory card's Download folder). After everything is safe at home, this page can delete the files from the phone for you.
Keep this screen open until every file says Sent.
Safe to delete from this phone
These files are safe at home. Everything is ticked. Untick anything you want to keep on the phone.
This phone does not let a web page delete files. Open the Files app (iPhone) or My Files (Android), delete the ticked files, then tap Done.
On the way home
These reached the server and are travelling to the home drive. You can close this page.