Amethyst expects a brand-new, blank drive when initialising (both
for backups and exclusive drives). It won't initialise any drive
that has or had data on it.
With the backup drives, you can format them under Windows as FAT32
and use them in the Amethyst server without having to initialise the drive.
Simply place the harddisk in the backup drive and run the backup.
This can not be done with exclusive drives (expects a brand-new, blank drive).
The 'Initialize drive' option only works with a brand-new, blank drive.