What is the proper way to format a USBDrive to store data?

I’ve been reading your post with great interest and have been waiting for answers to these type of questions:

  1. Are you using a current version of Manjaro KDE? I assumed KDE because the original post mentioned KDE Partition Manager.

  2. How are you mounting – what commands or what applications?

    • Are you using KDE’s Disk & Devices applet.
  3. Did you use lsof to find out what applications had files open on the drive?

  4. What commands are you using to unmount? Are you using sync? sync can take a long time (<>60 seconds maybe) depending on the type of data and the device.

  5. What’s being logged to the journal

    • Last boot in reverse (“q” to exit)
      journalctl -b -r

    • Or, follow the log messages as they occur (“ctrl-c” to exit). Note, start before you mount device
      journalctl -f

  6. Need to know more about your hardware: