Floppy Disk Drive Question Sizes 2.88Mb and 2.4Mb

I have been working around and on computers for a while... First new computer we bought was a 286 with a 20Mb HDD. That was to replace the 8088 system for accounting.

I just came across 3 floppy drive sizes I have never seen or heard off??
1) 5-1/4 drive 2.4 Mb
2) 3-1/2 drive 2.88Mb

Anybody know anything about these?? They power on but what disk to test with?

A few companies made 2.88MB 3.5" drives (IBM for one and they had the 2.88 mb capacity on the front of the eject button). I never see a quad density 5.25" drive have a picture?

Originally Posted by unknownk

A few companies made 2.88MB 3.5" drives (IBM for one and they had the 2.88 mb capacity on the front of the eject button). I never see a quad density 5.25" drive have a picture?

I will take one and post it tomorrow.

Are the 5.25" floppies worth ne thing? I've pulled quite a few from a recent load.