So, at this point, I am assuming that I have what appears to be a working Android system on my device. This is a good time to mention my experiences with the procedure, before I try again:
Firstly, this is the only procedure that has worked for me - 1. Power off the device, and again boot it into download mode:
- With USB plugged in, hold Volume up + Volume Down + Power
This can be found at Install /e/OS on a Samsung Galaxy Tab A7 10.4 2020 (Wi-Fi) - “gta4lwifi” at item eleven, under " Pre-Install Instructions".
Secondly, Heimdall appears to download both recovery.img and vbmeta.img, however it is unclear as to the location where it is downloaded to on the device. This becomes important later.
Thirdly, “Format the device” functions as advertised, as described on the install guide linked to above in this post. However, it diverges at the next section “Install /e/OS”, as it for some inexplicable reason is only a guide for those people using Windows on their PC. So, I tried following the [HOWTO] an Unified Install Guide Project for /e/.
Unfortunately, item four " Download a custom recovery manager .img" in that howto is vague regarding using the “recovery-e” method. As stated earlier, the download to the device (of apparently both files) functions fine, however it is unclear where the files are located on the device. This becomes important when arriving at the “recovery-e” main screen, as when choosing the “factory reset” option, there is a prompt as to where the vbmeta.img is on the device, and a file manager pops up, and it is necessary to find that file. As I didn’t know where the location was, I chose “Android” folder on internal storage. The script then rebooted the device and started to run an Android system setup, and apparently had also locked the bootloader at some point, thus resulting in the situation that I posted about, with the photos. At no point did I ever get “android recovery”, as in your picture.
So, where do I go from here? Do I just re-run the same procedure as I did before? If I don’t get more information or other form of guidance, the most likely result will be the same as last time, as far as I can see.