If you have a 3 1/2" drive, treasure it. They are becoming rare.
Sadly 3 1/2" discs degrade with time, and you may well find the files are corrupted. In this case you will need to find a free file recovery program. Hopefully any errors will be few enough for you to recover them manually.
Some years back I had the task of going through an engineering archive, deciding what could be kept and what could be thrown out. All the ancient stuff was perfectly readable, being in the form of Indian ink on film etc. but was no longer needed. The more modern stuff was on punched cards, paper and magnetic tape, 11" and 8" floppies, 5 1/4" floppies and up to date stuff on CDs and DVD. This would have been useful had we been able to read it, but much of it we no longer had the hardware to read it, and worse still, the DVDs which were in theory readable, turned out to be useless too as the design software used to produce it had been superseded or had been updated with newer versions and the old files proved incompatible!
I was shocked to find how ephemeral our archive proved to be. It is a serious problem and one which will get a lot worse! Much of the equipment which we thought we could produce was lost to us, because we could no longer access the design files! I retired at that point, so its no longer my problem, but my advice is to print it out whilst you still can and store it on old fashioned paper! Granted, this is pretty difficult with microchips with billions of transistors on them, but the lesson is to think carefully about storing electronic information if you need it for years. It can turn out to be impossible!
Edited by Excoriator (28th Nov 2015 10:45pm)