Data recovery
To recover data, plug in external hard drive into the MacBook
But first you have to reduce security in order to use the external hard drive. Go to start up utility disk and press on security. From there you can change from full security to No security.
After that you can enter your external hard drive. Once in open the macbook files and select the data you want to recover.
However, some folders allows no access. So what you must do is get info. Open lock, change access to read and write for everyone and delete the first one by pressing the minimum button.