The 2011 MacBook Pro upgrade update has proven to be a bit of a disaster. Battery supplied by Replace Base (who had been very helpful) turned out to be the wrong one, so replacement postponed until I can get the correct one.
Took a while but got the iOS updated to High Sierra. Think that’s the most recent it will run.
RAM increase to 8gb (the max I believe) was very straightforward.
Sadly, I can’t say the same about the hard drive to ssd swap. Crucial MX500 1Tb. I’ve fitted one to a Windows PC before so was expecting it to be relatively easy. Not so. Instructions seemed simple enough but whatever I did I couldn’t get the drive formatted. tried it on an iMac, same problem. Just to prove that it wasn’t a faulty I drive, I mounted it to a Win 10 PC, and after much buggering about managed to get it formatted and set up as a second drive. Problem seemed to be something to do with a partition that had been created.
So, back to the Macbook, which would recognise it but wouldn’t format. I gave up.
Will have to take it to someone who knows what they are doing and put my hand in my pocket. ☹️