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all props to the lady, her content is usually on point and she's really trying but please don't use clonezilla for cloning disk-to-disk. if you have a fairly modern OS with say encrypted btrfs, this thing copies the whole disk (instead of only the occupied space). so if you have a 500 GB disk with 50 GB used, clonezilla will copy the whole 500 gigs. aside from that not being super-efficient, it's also not very healthy for the target SSD. it also copies the UUIDs, so if you leave both disks in the system, havoc awaits.
a vastly faster and way more efficient solution is to use
btrfs send | btrfs receiveto copy only the data. sadly, no beginner-friendly tool for such an operation exists and you're still supposed to set up everything by hand (new partition layout, grub or systemd-boot install, fstab, etc).eons ago, we had SuperDuper! on macOS. a free and simple tool anyone could use. that thing clones the disk by copying only the data, so it's possible to clone a larger drive to a smaller (provided the data fits), makes the target bootable, etc. so you just plug it in and it works and all of that works from a live system, no need for USB flashes and such! I'm not aware of any such tool available here and clonezilla even in "beginner mode" is a tall order for non-experienced user.