u/Bladerrw

I am new to the Amiga, I only had C64’s. I have bought off eBay 2 copies of the Amiga version of Microprose Gunship, both do not work. One doesn’t load and the Amiga gives me an error message and the other loads up to playing the game and then goes back to the beginning load screen. I have only just bought the Amiga and I’m wondering if it is a disk drive fault? If i buy an external drive can i load Gunship from that to test the disk?