
How to Recover your Data
Step 1
Determine if the disk is dead and Find a way to boot
a - Recovery partition
Command – R
b - Thumb drive with an OS
diskmakerx
c - External drive with an OS
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Mac OS X Yosemite 10.10.4 Bootable USB
Hold down the option Key to select the Thumb Drive
d - Single user mode
Command (⌘)-S
e - Zap your PRAM
Option-Command (⌘)-P-R
f - Start-up in safe mode
Hold the shift key on boot
g - Eject any drives
Hold the mouse or trackpad button
Step 2 - Run Disk Utility
Step 3 - Try Recovery Utilities
Lacie rugged drives