Hi Martin.
Do what the others are suggesting. Unscrew and take the cover off. What you should see, if it's there, is a Zorro 2 card with a HD on it(normally a 2091 card). Any SCSI HD will do, as long as it's below 4 gigabytes.
If there is no card, then you have a floppy run amiga2000. You'll have to find one somehow.
