Samsung Galaxy Tab A7 community /e/OS install using LMDE computer

[piero]

@globetrotterdk

is it recommended to flash an entire Samsung firmware

No,
as you already have latest installed on your device.

@globetrotterdk

is it recommended to flash a custom recovery to get /e/OS installed on the Galaxy Tab A7 (SM-T500)?

Yes,
as it is mandatory…

@globetrotterdk

@piero

The real Trick is to reboot directly into recovery mode just after to have flashing the custom recovery.

@piero

…NOW COMES THE CRUTIAL STEP !..

• To get out of the Download mode you must Force Power Off your Samsung device,
  (on some old devices, unplug the device,)
  hold Volume Down + Power.
  release when you see the screen turn off…

…IT IS THE CRUTIAL STEP !..

• immediately Boot to Recovery before any other boot mode attempt,
  hold Volume up + Home + Power
  release Power when you see the very little blue line in the top of the screen…

…IT WAS THE CRUTIAL STEP !..