Epson Equity 320SX PLUS - Manual (Page 68)

If you have a 3 1/2-inch diskette drive, insert the diskette with
the label facing up and the metal shutter leading into the
drive, as shown in the following illustration. Slide the
diskette into the drive until it clicks into place.
When you want to remove the diskette, make sure the drive
light is off; then press the release button. When the diskette
pops out, remove it and store it properly.
Caution
Never remove a diskette or reset or turn off the computer
while a diskette drive light is on. You could lose data. Also,
be sure to remove all diskettes before you turn off the
computer.
3-16 Using Your Computer