I have a 2012 Macbook Air with 512Gb SSD. I took the SSD out for a while and put it back while the macbook air in sleep mode, obviously i'm not paying attention thinking it's turned off. Then, turned off the macbook air and back on but was stuck with disc utility window, there was no option but to reinstall the Mac OS El Capitan. Now my data all gone around 300 GB of data! I used various recovery software but all they did was recovering existing El Capitan system files with no foot print to the old files. How would I recover my data from this 512gb SSD hard drive? Thanks for any help.