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Bronxteck recently reminded us of links Apple publish in relation to creating bootable installers for OS X and macOS from El Capitan 10.11, so here's a link to the related main page: https://support.apple.com/en-us/HT201372 Very useful as a replacement to the old AppStore method that allowed registered users to re-download an OS X/macOS installation package if they had already done so in the past. 8GB USB keys/flash disks required up to Catalina, 16GB from Big Sur. Whilst the information is obviously meant for Apple Mac computers, it's nevertheless 100% relevant to the 1st phase of creating USB installers for Hackintosh computers, the 2nd phase being the necessary installation of the bootloader (Chameleon/Enoch, Clover or otherwise).

https://www.digitaltrends.com/computing/how-to-clone-a-hard-drive/

yes you can backup your OS's but i am not sure of what third party tool can handle APFS other then apples disk utility. you can clone existing partitions back to a new drive after partitioning the new drive respectively. sometimes its simpler to use a third party app like clonzilla or carbon copy cloner or similar.

You didn't follow my instruction properly mainly with the ECDV to EC patch. Here's an updated bootpack. Should work on most Exx70 models. You just need to create your own USB Port kext. This should get you rolling into Catalina. Replace contents into /EFI/Clover Add new Bluetooth kexts for Catalina under CopyToLE Enabled Fn+F11 and Fn+F12 for Brightness control Exx70.zip