Epson 20 - Manual (Page 71)

Slide the diskette into the slot until it is in all the way, Then turn the
latch down to lock it in a vertical position. This keeps the diskette in
place and enables the read/write heads in the disk drive to access the
diskette.
To remove the diskette, turn the latch up until it is horizontal and the
edge of the diskette pops out. Carefully pull out the diskette, place it
in its protective envelope, and store it in a proper location, such as a
diskette container. __
If you have a 3½-inch diskette drive, insert the diskette with the label
facing up and the metal shutter leading into the drive, as shown
below. Slide the diskette into the drive until it clicks into place.
To remove a 3½-inch diskette, press the release button to release it.
When the diskette pops out of the drive, pull it out and store it
properly.
4-14
Using the Equity 386