Looking to upgrade toshiba satellite

aram5206

Honorable
Sep 15, 2013
5
0
10,510
I have a toshiba satellite l355d-s7825 I'm looking to upgrade. From what I've read I have a limit of 4gb of ram for my mobo and buying a new CPU isn't worth the cost. I currently have 3gb in ram.
What can I do to further increase its speed? Should I install a new hdd? Is solid state compatible with my mobo? I'd like to keep it running for a while longer if I can.