We have no less than four Samsung SM-A520F phones in our household, all running /e/OS. Unfortunately there are no more updates for the a5y17lte build. I found an unofficial build here in this forum, so I downloaded it on my PC.
copy the zip to a SDcard or in the phone “internal storage”,
boot the phone into recovery mode
Boot Recovery Mode on (a5y17lte)
With the device powered off - hold Volume Up + Home + Power
In android R 11 : → settings → system → advanced → gesture → power menu → advanced restart
then depend of the recovery manager installed on the device :
TWRP : use the install feature navigate to where the file is stored
SDcard is located at /external_sd, when “internal storage” is located to /sdcard
recovery-e → apply update → choose from sdcard1 or → choose from internal storage
navigate to where the file is stored
SDcard is located at /external_sd, when “internal storage” is located to /sdcard
on some models the recovery-e don’t have this feature in this case, replace it with TWRP
Thank you for your prompt answer. In the meantime I fiddled around a bit more. I was surprised to see that ADB worked perfectly on my girlfriend’s phone, which is the exact same model. So I tried a different cable, and now it works perfectly with ADB.