Tap on the triple dot next to a file, first option

Total commander was never open source, even though it’s freeware.

Fossify looks similar, but it misses some crucial features I use frequently. I downloaded it now to check it, Material can do these things, while Fossify can’t:

• Open multiple windows for commander like usage
• Connect to remote shares with SFTP, FTP, SMB or Webdav
• Connect to app storage with Storage Access Framework

MaterialFiles can connect to ftp, sftp, webdav and smb. It has a text editor. There is built in image viewer and music player in most roms nowadays, and MaterialFiles has an “open with” option where you can select what you want to do with a file.

ES File Explorer was very good at the beginning, but it enshittified quickly. Nowadays MaterialFiles is the best file explorer for Android, and it has more features than ES had ever. And it’s open source so it can’t have a similar fate. Google Play link, F-droid link

My similar turning point was when they shut down Google Reader in 2013. Never forget.