Epson ActionNote - Manual (Page 58)

To remove the diskette, make sure the drive light is off; then
press the release button. When the diskette pops out, remove
and store it properly.
Caution
Never remove a diskette or reset or turn off the computer
while the drive light is on. You could lose data. Also, be sure
to remove all diskettes before you turn off the computer.
Write-protecting Diskettes
You can write-protect a diskette to prevent its data from being
altered. When a diskette is write-protected, you can read it and
copy data from it, but you cannot store new data on it or delete
any files it contains. If you try to change data stored on a
write-protected diskette, you will see an error message.
To write-protect a diskette, turn it over so you are looking at
the underside. Slide the switch in the lower right comer toward
the outer edge of the diskette until it clicks into position,
exposing a hole.
To remove the write protection, slide the switch toward the
center of the diskette until the hole is covered.
Using Your Computer 3-15