Did you remove the hard disk from the MyCloud enclosure?
Did you connect the removed hard disk to another computer and format it as NTFS?
Why did you do that?
The MyCloud isn’t a simple external hard disk drive; it is a NAS. It is a small linux computer with a hard disk drive it uses to provide a file server. Its hard disk drive is formatted with a number of partitions, using the ext3 and ext4 file systems. The operating system is stored on the hard disk.
If you have formatted the hard disk with NTFS, you have destroyed the original linux partitions, operating system and file system, so your mycloud is now a brick. You will have to re-creeate the original disk. As Bennor says, search for unbricking guides. Here’s one popular guide:
