I want to know if I can upgrade the harddrive and memory

Depending on the memory you already have you can install upto a maximum of 1GB 266MHZ DDR, and cannot see any reason for not being able to upgrade your hardrive for a bigger one, but be aware that the Operating system backup will probably be on a seperate partition on your current hardrive, unless you got an installation cd with your laptop.

This site is a good reference for finding exactly what parts are compatible with what models. It helps with all types of repairs, replacements and upgrades.

Here is the web site's front page:
http://www.comptick.com

Here is the page for your model:
http://www.comptick.com/gateway---m305cr...

I actually just upgraded a M305CRV to 2 GB RAM (even though the supposed limit is 1 GB) and it's running great! Pleasantly surprised.

theres a limit when you try to upgrade the memory of your laptop(gateway MT6705), you can only upgrade it upto 2GB of RAM, thats it! i bought two new 2GB RAM hoping i could have a 4gig of ram but to my surprise, my laptop wont even boot. tried removing the other one and it all went thru, this sucks , now what am i gonna do with my other 2gig memory???this sucks.