In the google drive app on Android you can select multiple files and download them together. Unfortunately, there are some drawbacks
- it is not always clear if the download is still in progress
- some files may be downloaded twice
- the download may be interrupted
- the download may not start (clearing the google drive app cache might help, drive / storage / clear data)
Using Total commander with the drive plugin was a good alternative but now it needs creating your own client id and client secret. the description is not fully valid any more, so I updated it (of course as times goes by this will incorrect also).
- create a google cloud project
- create an OAuth consent screen
- if you entered into OAuth consent screen creation then the left menu has changed
- you can go back by selecting the navigation menu (top left) and "api and services"
- wizard
- after creating the project you are here: "Google Auth Platform / overview", press Get started
- app name: Total Commander Drive
- User support email: your email
- audience: external
- Contact Information: your email
- create scope
- data access / add or remove scopes / check API:Google Drive API" Scope: ".../auth/drive"
- update
- save and continue
- create test user
- audience / add users / add your email
- create credentials
- client / create client / the application type is Desktop app and not android app
- the name can be: TC Drive Plugin
- download the json
- upload the json file to you phone using the drive app
- use json
- total commander app / main menu / drive / settings and privacy / json / select the json file
- if there is an error then make sure the json file is a standard text file
- check encoding and special characters like non-breaking space
- login
- total commander app / main menu / drive / your account
- at first login there are some extra steps
