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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Move bookworm system from SSD to NVME
Date: Wed, 31 Jul 2024 22:28:51 -0000 (UTC)
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On Wed, 31 Jul 2024 09:51:00 +0200, Jesper wrote:

>     3: Connect NVME to raspi, boot from SD-card and copy the system from
> SSD to NVME. But how?

Use rsync to do a file-level copy. Then the difference in volume sizes 
won’t matter.

I haven’t done this on ARM, only on x86 machines (several times), but the 
procedure should be similar: after copying the installation across, you 
will need to fix up /etc/fstab for the changed filesystem IDs, and also 
reinstall the bootloader. Then you should be good to go.