I have three 10TB hard drives labeled as D:, F:, and G: respectively. Each of them has some free space available at the end of the drive. There are no OSes installed on any of the drives and keeping the data that is on the drives must be kept intact. I cannot format or lose the data on these drives. I unfortunately have no way of backing up this data at the time of writing, but that's a separate issue.
The available space is as follows:
D: has 89.6GB availableF: has 89.7GB availableG: has 89.9GB available
What I would like to do, if possible, is combine the available space from all 3 drives into one "virtual" drive with it's own drive letter (i.e. drive J: with a total of 269.2GB) without having to format the disks. I'd like to keep the data as-is and only work with the free space at the end of the drives.
I am not quite sure how to go about doing this or if I even can. Any help is appreciated. Thank you.