Epson 386SX - Manual (Page 87)

If you have a 5 diskette drive, hold the diskette with the
label facing up and the read/write slot leading into the drive.
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
diskette 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.
WARNING
Never remove a diskette or turn off the computer while the
diskette drive light is on. You could lose data. Also, be sure to
remove all diskettes before you turn off the computer.
Using the Equity 386SX 3-17