Installed El Capitan Macbook Pro won't boot
I downloaded and installed El Capitan. After several failed attempts by the laptop to boot using my profile it eventually started up as a brand new profile with everything as you would fine if I'd just bought it new. Then when checking my storage it shows that my memory has been taken up by my old stuff. I shutdown the laptop again and my profile came up but again would not boot. I am currently in the new profile and seeking advice on how to access my old files. Thank you
MacBook Pro (13-inch, Early 2011)
Processor 2.3 GHz Intel Core i5
Memory 4 GB
MacBook Pro, Mac OS X (10.7.3)