Transferring files from original imac AND external CD for old imac
I have an original iMac that has tons of files on it I would like to save. I created a LOT of materials when I was teaching and they are all on the old iMac. It also has two games I bought on floppy discs that I would really like to keep. I tried to load files on a Passport, but the iMac won't recognize it. I have two other old iMacs (not quite originals) as well, but they won't take the Passport either. They will both take a flash drive. I can take word processing files (I can't even remember the application at the moment) off the older one and convert them to Apple Works on the other one, then take the converted files to our iMac 9.1 and convert them to Pages. Then I put them on the Passport. It is a pain, but at least it works. I can also save the documents as pdfs and put them directly on the newer iMac and copy and paste in a Pages document.
The original iMac does not lend itself to any of this. What is the best way to transfer files? It seems like a very long time ago I tried to connect it to my newer iMac with an Ethernet cable but it wouldn't accept the cable. If I am remembering correctly I called Apple Support and they said it lacked something that would allow it to connect. I do not remember if I have tried a flash drive on it or not. I believe I did and it would not recognize it.
Also, does anyone know how I can manage to save a copy of the games? Since I bought them on floppies I can't reinstall them if something happens, but I believe it is within the law to make a backup copy. Someone please correct me if I am wrong. I do have an external floppy reader for the original iMac, but it only works on user created floppies, not commercial ones. If I can manage to hook up to a flash drive or another computer and I simply save the game application, will that be enough? Or is it not possible to know until I try? Will saving the application get all the necessary files?
My second question concerns the newer (but still really old) iMacs. My daughter would love to play some of the games she used to play on them, but the CD drives do not work. Does anyone know where I can get an external CD drive that we can attach to these old iMacs so she can enjoy her games? The computers work fine; she just can't insert the CDs, because it's next to impossible to get them out again.
I believe on the "newer" two we are running OS 9, at least on one of them. I do not recall the OS on the original, but it is whatever it came with. OS 8, perhaps? It has been probably half a year since we fired it up.
I appreciate any advice and help anyone can give me. We really like these old iMacs, which is why we still have three of them. If we can save the files off the original iMac, we would still keep it so we could play our two old games from time to time. :-) I would part with one of the other old iMacs, but I really need to get the files first, and since it won't take a Passport I'm wondering if I'm stuck putting files a few at a time on a flash drive. Do you think it would take an ethernet cable? It seems like I tried to connect to my newer iMac but I couldn't get the computers to recognize each other. I followed all the steps for sharing, but I still couldn't get it to work.
Thank you so much.
iMac, iOS 8.3