This looks like a Lenovo system.
If it is, then the partitions are:
- OEM Partition: backup copies of drivers for re-installations
- EFI Partition: created by Windows when it was installed; needed for boot
- Recovery Partitions: stores the Lenovo OneKey Recovery software, and a factory image of the system; these are optional, and can be deleted if you don't use this feature
These drives have a custom raw file system that only firmware can read, not Windows. Hence Windows does not recognise them as valid drives, cannot detect any files on them, and is forced to label them as 'voids'.