There should not be important data in it because the creation process will erase the USB drive.

You need to prepare a USB drive that has at least 8GB of space.

You need to have a normal working Mac device at hand to create a recovery drive.

You can use this software to create a USB recovery drive, then start your Mac from this bootable USB for data recovery. You can use Stellar Data Recovery for Mac, a special Mac data recovery software, to rescue your files. If the files on your Mac are valuable, you should back them up before fixing the Mac question mark folder on startup issue to ensure data security.

Read More Preparation: Back up Your Mac Data In response to these reasons, we will provide some corresponding solutions and show them in this article. The system files for Mac start-up and boot are corrupt.The cable connecting the driver and the motherboard is loose or damaged.Some faulty peripheral devices corrupt your Mac.If you want to solve this issue, you should figure out the cause of this problem first. Reasons for Mac Folder with Question Mark When this issue happens, you will see the following interface. If your Mac boots into a flashing folder with a question mark, it usually means that your Mac can’t find the start-up disk or the start-up doesn’t contain a working Mac operating system so it can’t boot into your Mac OS. Mac Boots into a Flashing Folder with a Question Mark Solution 8: Replace the Damaged Start-up Disk.Solution 6: Use Disk Utility to Repair the Start-up Disk.Solution 5: Make Sure the Preferred Start-up Disk Is Selected.Solution 4: Start Your Mac into Safe Mode.Solution 2: Disconnect All the Peripheral Devices.

Mac Boots into a Flashing Folder with a Question Mark.If your Mac computer doesn’t start normally but boot into a flashing folder with a question mark, do you know the reasons and how to fix this issue? MiniTool Software will show you the possible reasons for this issue, as well we some corresponding solutions.

Macbook blinking question mark