Cloning a Filevault encrypted HDD drive to SSD

Because FileVault is "encryption on the fly", if you are logged in (and therefore disk files are visible) a "File-by-File" transfer should not require FileVault turned off.

Just don't use Block Copy and it should be fine.

As you read the files, they will be un-encrypted on the fly, and perfectly able to be copied.

If you have a recent Time Machine backup, that would be vastly superior. This completely side-steps the ugly issue of whether your drive is in la-la-land about its current encrypted state.

A re-Install of MacOS is commonly used as a debugging technique, because it installs a PERFECT copy every time.

At first run, Setup Assistant runs, and allows you to choose what to restore from backup:

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Your drive appears to be stuck in the middle of encrypting. That is a problem. It should not take more than about four hours of non-sleeping time.

Have you allowed it to run and not sleep for a full four hours since you asked it to start Encrypting?

If you have, I recommend you NOT try to change its Encryption state again, but instead salvage what you can in its current state.

When you run FileVault off, it starts a background process that reads, then re-writes as clear text, every file on your drive. For an average drive, that takes all afternoon and rewrites all the data on the entire drive.

Block Copy is a speedup that can only be used when copying ENTIRE Volumes under certain conditions, such as don't care if you copy empty data blocks. The drive can not be changed in size.

If you do ANY selection of files, you must do a File-by-File copy.

Block copy can only be used when you make an exact replica of a drive (including copying the empty space).

All ordinary cases use file-by-file copy. If you include or exclude any files or classes of files, it can not use block copy.

Cloning does not mean the same as block copy.

That should only cause issues when trying to copy a drive where you are not logged in, and therefore have not activated decryption "on-the-fly" and therefore cannot see any files.

If you can see any files, decryption on-the-fly is active, and you will copy the files.

You are wildly overthinking this.

Just copy the FILES and not replicate the entire DRIVE and you will be fine.

All the advice I already posted on this thread is based on the premise that you NOT going to turn off Encryption.

Just read again, but this time assume you are NOT going to turn off encryption.