I have about 4 partitions in my hard drive. There is also a partition with about 50gb free space but when I try to shrink it using the windows disk manager, it can only shrink about 15mb. And I don't know why. I should be able to shrink to about 49gb because I have 50gb free space on that partition.
Its a seagate 500gb external hard drive. Connected to the computer using usb cable.