@ami500:
You will have to partition it on the Amiga and then format the partitions to be able to use it - just like you would have to do one a pc.
To partition the disk you can use HDToolBox which should be on the 'Install' disk of the Workbench disk set. This holds true if you have Workbench 2.0 and above. If not, I am positive there exist some software to partition the disk on the install disk supplied with the A590.
Good luck!
/Patrik
