How to add a fast new SSD to your old Mac or MacBook for only $150 - 9to5Mac
Apple MacBook Pro 13" (Early 2011) Core i5 8GB Ram 256GB SSD macOS Monterey | eBay
Apple MacBook Pro Early 2011 - 13-inch 2.7GHz Core i7 Apple Memory/RAM & SSD Upgrades | Kingston
Amazon.com: 1TB 2.5" Hard Drive for Apple MacBook Pro (15-inch, Early 2011) (17-inch, Early 2011) (13-inch, Early 2011) Laptops : Electronics
Upgrade the MBP MC724 Early 2011 — Hi, I am Benny
MacBook Pro 13" Unibody Early 2011 Repair - iFixit
MacBook Pro 13" Unibody Early 2011 Hard Drive Replacement - iFixit Repair Guide
Replace your 2009-2012 MacBook Pro HD with an SSD
Amazon.com: 480GB 2.5" SSD Solid State Drive for Apple MacBook Pro (15-inch, Early 2011) (17-inch, Early 2011) (13-inch, Early 2011) Laptops : Electronics