Download the manual here: http://dl2.opendrivers.com/dl_file.php?dl=dl2&brand=multifunction%2Fsharp-electronics&file=MXM282N-M362N-M452N-M502N_OM_Online-Manual_GB.pdf&check=a35c9re0e86ed5&driver=cs6f4548 dl2 opendrivers com
Hi there, I could not find instructions for that particular model, but there is a video here for Hard Drive removal for a SHARP AR-M355 - which I think is similar: https://www.youtube.com/watch?v=6s_TcQrGVhQ&t=16s
I hope this helps!