Well if you have a scsi hard drive (I assume you do since you want to transfer a lot of data) you can get a scsi cd-rom and transfer files from there. If that is not an option, you could try making a pc compatible partition on your disk and copy the files there, you can use ext2 for linux or f32 for windows. However mint or magic will be required.
Apart from that the usual file transfer methods such as ghostlink, parcp etc can also be used.
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