8GB (4GBx2) Team High Performance Memory RAM Upgrade For Toshiba Portege M800-121 M900 Laptop. The Memory Kit comes with Life Time Warranty. at Amazon.com
OFFTEK 8GB Replacement Memory RAM Upgrade for Toshiba Portege R830-S8320 (DDR3-10600) Laptop Memory at Amazon.com
How to upgrade RAM in Toshiba Portege M400 – Inside my laptop