new hard drive setup in 2014 MacBook Air 200F 5001F flashing mystery file errors

If you're working on a 2014 MacBook Air with a brand-new replacement SSD and no operating system installed, the first thing to understand is that the flashing folder with a question mark is normal. It simply means the Mac cannot find a bootable operating system.

The Internet Recovery errors (-200F and -5001F), however, suggest that the recovery process is failing before macOS can be installed. This may be related to the network connection, Apple's recovery servers, or potentially a firmware or hardware compatibility issue.

I would recommend troubleshooting in the following order:

1. Check the Internet connection

• Try connecting to a completely different Wi-Fi network.
• If possible, use a wired Ethernet connection with a compatible USB Ethernet adapter.
• Avoid public Wi-Fi networks that require you to accept terms through a browser.
• Restart your router and try Internet Recovery again.

2. Reset the NVRAM

Shut down the MacBook. Turn it on and immediately hold:

Option + Command + P + R

Keep holding the keys for approximately 20 seconds, then release them. Shut down and try Internet Recovery again.

3. Try both Internet Recovery combinations

With the Mac completely shut down, turn it on while holding:

• Option + Command + R: Attempts to install the latest macOS compatible with the Mac.
• Shift + Option + Command + R: Attempts to install the original macOS version supplied with the Mac, or the closest version still available.

Wait for the spinning globe to appear before releasing the keys.

4. Check whether the replacement SSD is recognized

If you manage to get into macOS Recovery:

1. Open Disk Utility.
2. Select View > Show All Devices.
3. Check whether the internal SSD appears.
4. If it does, select the physical drive and erase it.
5. Use GUID Partition Map as the scheme.
6. Choose APFS for newer macOS versions, or Mac OS Extended (Journaled) for older installers that require it.

Once formatted, quit Disk Utility and try installing macOS.

5. Verify SSD compatibility

This is particularly important with the 2014 MacBook Air. It uses Apple's proprietary blade SSD connector, not a standard M.2 connector.

If you installed an aftermarket SSD, make sure it is specifically compatible with the 2013–2017 MacBook Air, including any required adapter.

Some replacement SSDs also require newer firmware or storage support. An older Internet Recovery environment may not have the necessary drivers. In that situation, installing macOS High Sierra or later using a bootable USB installer may be necessary.

6. Try a bootable USB installer

If Internet Recovery continues to fail, another option is to use a second Mac to create a bootable macOS USB installer.

For a 2014 MacBook Air, a compatible macOS installer such as High Sierra, Big Sur, or Monterey can be used, depending on the SSD and firmware compatibility.

Insert the USB installer, turn on the Mac while holding the Option (Alt) key, select the installer, and follow the installation instructions.

My recommendation:

Before assuming the replacement SSD is defective or that the logic board has failed, establish whether Internet Recovery works on another network and whether the internal SSD is visible in Disk Utility.

The flashing question-mark folder itself is not a hardware failure indication; it is expected when there is no operating system installed.

Apple's recovery troubleshooting guide:

How to start up from macOS Recovery - Apple Support (CA)

A few questions that would help narrow this down:

1. Is this the 11-inch or 13-inch 2014 MacBook Air?
2. Is the replacement drive an original Apple SSD or an aftermarket SSD? If aftermarket, what brand and model?
3. Does the spinning globe appear before the -200F or -5001F error?
4. Can you get into Disk Utility, and if so, does it recognize the new SSD?

With those details, it should be possible to narrow down whether you're dealing with an Internet Recovery issue, an SSD compatibility problem, or a firmware-related issue rather than replacing parts unnecessarily.

Additional references:

Apple – Starting up from macOS Recovery.

iFixit – 2014 MacBook Air SSD replacement guide.

Apple – How to reinstall macOS.