Apple charges a premium for built-in storage, so investing in an affordable external drive can help solve your storage ...

Otherwise, you'll need to format to "Mac OS Extended (Journaled)" for El Capitan and earlier. When you're sure about your decision, click "Erase" and confirm. Finally, quit Disk Utility and select ...

These include restoring from a Time Machine backup, reinstalling Mac OS X, getting help online and using Disk Utility. Note: There are other (more advanced) options available from the menu bar within ...