This only applies to NTFS and RAW volumes. It’s also important to take note that Disk Management is unable to extend volumes if the target volume is in FAT32. One of the possible reasons for the said error is that there is simply no adequate unallocated space next to the partition that you are planning to extend. When you’re trying to extend volumes, you may encounter the problem of the Extend Volume option being greyed out, meaning it’s not activated or you basically can’t use it. Thus, many users resolve to extend volume on the drive. If a drive becomes saturated, it may sacrifice your computer’s speeds.
Extending a drive’s volume is usually done to unload a particular drive from a heavy load of data.
