Drives sold pre-formatted with a format such as FAT32 may not perform as expected with Final Cut Pro, Motion or Compressor.
To check the format of a drive, select the drive in the Finder and then choose Get Info from the File menu. The format is shown in the Format section under General Information.
If you need to format a drive, use the APFS or Mac OS Extended (Journaled) format for best performance. If your Mac is running macOS Mojave or later, use the APFS format. When you format a drive, any data on the volume will be deleted, so make sure you create a backup if you want to keep the data.
You can’t store your Final Cut Pro library on a drive used for Time Machine backups.