Well, terms for storage have changed over the years I suppose. I once worked
out that on a ZX Spectrum, about 5 minutes of cassette tape equalled
32Kbits at 1200 baud, but of course the special loaders games used pushed
the baude rate up so the loading was much faster, and of course less
reliable.

Then of course reel to reel could have several speeds, and the difference
was in frequency responce and noise performance as it was analogue.
If you can explain the difference between analogue storage and digital
storage it might make the penny drop.

Did you know that the Gallileo probe to Jupiter had a tape storage system
on board for use to send the stored data to earth. It started to stick with
age so they had to spool it back and forwards a bit each time theywanted to
use it.
More modern space vehicles use Flash ram of course, but these have issues
that tweak their bits when they get hit by a cosmic ray.

More useless information from the web.
Brian

--
From the Sofa of Brian Gaff Reply address is active
"Bill Wright" wrote in message
...
Katie, who is 11, was helping me in the workshop today. She told me how
some of her class been in trouble for filming the teachers covertly. Of
course I told her how, in 1965, I'd made a sound recording of our maths
teacher, with the class deliberately winding him up just to make it more
fun. I then found myself trying to explain about reel-to-reel tape
recorders. I could see that Katie just couldn't grasp the concept. Finally
she asked, "But how much memory did it have?"

Bill