There is no such thing as a G3 mini. A G4 mini yes. Use Target Disk Mode if that's what you have:
Note, the Mac Mini may not be able to boot the machine without rendering itself unbootable on its own. The problem is many Intel Macs operate better when formatted with GUID formatting, which PowerPC Macs do not support. But as a data repository the Mac Mini is quite capable.
Duh. Usb oofcourse. My mac does not have firewire or thunderbolt, nor does the olde Mini. I have a cable which is a ? Vssomething or other which plugged in to a HMTL on the back of my Sony Bravia TV which i used as a monitor. (It didn't work very good, because of the resolution.) It screws on to the back of the Mini as an adaptor. I suppose that wouldn't work either.
The trouble is I have no monitor for the Mini now that it is replaced on the TV by my ITV. I was hoping I could avoid pulling everything apart by plugging into my Mac, but now I think that won't work either
To use it as a hard disk, I have to erase all the old stuff, and now I can't see to do that either. I am beginning to think that the old cable to the TV is going to have to be installed, so that I can maintain the unit. After all, it is nothing but a box!
Maybe if I took It to the Geek Squad they could guide me. What is your advice.
By the way, thanks for you help! C
All iMacs have Firewire until the newest one that are less than a cm thick, which switched to Thunderbolt alone. Even the 2011 version had Thunderbolt and Firewire 800. The old Mac Mini G4 has Firewire, only it was Firewire 400. You just don't know how to identify them:
The image above shows two Firewire 400 ports labelled Firewire, and one Firewire 800 port.