Drives sold pre-formatted with a format such as FAT32 might not perform as expected with Final Cut Pro, Motion, or Compressor.
To check the format of a drive, select the drive in the Finder, 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 is deleted, so make sure you create a backup if you want to keep the data.
You can’t store your Final Cut Pro X library on a drive used for Time Machine backups.