Storage devices 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 storage device, select the device 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 storage device, 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 storage device, 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 library on a storage device used for Time Machine backups.