[SOLVED] Disk Management - Unable to extend volume from an uneeded partition.

Lutfij

Titan
Moderator
Since C is your OS drive and is in use, you will need to use a tool like EASEUS partition master to do what you're looking to do, however with the way it looks on Disk Manager, I'd advise against tampering with the drive structure unless you intend to reinstall your OS from scratch and you don't have any valuable data on the HDD(SSD?).