Is it possible to move a Mail folder from iMac to USB flash drive?

As an alternative if you want to save them to later put back on a Mac then just right click on a folder and select export. Pick your USB drive. Later just import into mail.

Absolutely, you can use an Apple Mail converter to export your folders into various file formats like MSG, PST, EML, HTML, CSV, or PDF. Within the software interface, you have the option to choose a particular folder for the conversion process. Once converted, you can save these files onto your USB flash drive for easy transfer. This method ensures your Mail folders are saved in compatible formats that can be easily stored and accessed on your USB drive.

Prior to that, you must export Apple Mail data for the conversion process. Please refer to the instructions below. Subsequently, utilize the same file in the Apple Mail converter.

Import or export mailboxes in Mail on Mac - Apple Support (IN)

No, you can't do that by just dragging. You'll need to do the following:

1 - create folders on the Desktop and name them the same as the Mail folders you'll be exporting.

2 - select all of the emails in one Mailbox and export them as a PDFs or Save As one of these formats

to the folder on the Desktop with the same name.

3 - drag the folder from the Desktop to the Flash Drive.

Note: if you expect to import the emails into the Mail app on another Mac you should use the Raw Message Source which is .eml.

If you want to move a folder from iMac to USB flash drive then you can easily export emails by using BitRecover Apple Mail Converter as it offers to convert into various file formats such as PDF, PST, TXT, EML, MBOX and many more export features.

Ronasara wrote:

I would add that Mail is part of the Mac's operating system and the OS is write protected, so no part of it can be removed or moved as you wished to do.

Only the Mail app is part of the system. The emails are stored in the User/Home/Library/Mail/V10 folder.

I would add that Mail is part of the Mac's operating system and the OS is write protected, so no part of it can be removed or moved as you wished to do.