A:Answeri purchased for my PS4 and was able to install with no problems so i think the ps3 would be the same no issues you just need a flash drive (thumb drive) thumbdrive for the firmware id say at lest 2gb
A:AnswerYes, this drive will fit, however, it is slow. You may want to consider an SSD for the boot drive and a Data Doubler with this drive for storage.
A:AnswerI am not familiar with a Satellite L55-A5226. Having said that, if the Satellite L55-A5226 currently holds a hard drive it is probably a standard 3.5. Installing a SSD in the same location will require an adapter since the SSD is 2.5. A 5400 rpm is very slow my todays standards and are usually found in many lower end laptops. 5400 rpm hard drives also have the traditional moving parts and cause substantial heat. An SSD has no moving parts much less heat and is extremely fast by comparison. I hope this answers your questions and helps in your decision.