[Samsung Galaxy Tab S5e Guides, News, & Discussion] ExTall:
I wrote this guide because I had difficulty trying to instal a patched version of twrp through odin so I found this alternative way which worked very well for me.

Please read all through especially the warning at the end before attempting to follow this guide.

If you decide to follow this guide, you do so at your own risk.

You will probably be using different versions of Firmware, twrp and magisk so I cannot guarantee the outcome will be the same.

There are easier ways to install twrp if you are wanting to install a custom ROM but then you would miss out on Samsung's amazing DEX which I love.

1. Rooted.

Your Galaxy Tab s5e needs to be rooted by magisk. The best guide to be found is here on xda.

2. Backup.

All internal storage will be wiped so It is a good idea to do a backup of your apps and everything else to you SD card which should be safe. Titanium backup is very good.

3. APK

Make sure you have the apk files for 'magisk manager' and 'Official twrp app' on your SD card in a clearly named folder. e.g, 'files for installing twrp'

To get the apk for the official twrp app, download it from the play store, navigate to:-

System root / data / app / me.twrp.twrpapp / base.apk

Copy base.apk to SD card. (This is the apk for official twrp app).

.. Or ..

Use an apk extractor app

4. Remove accounts.

It is best to remove Google and Samsung accounts before doing a format and data wipe incase you forget your login and then your device gets locked.

To remove accounts go to settings, accounts, then click on each account and remove it.

5. Download

Download a zipp file called 'Samsung multi dissabler', and move it to your 'files for installing twrp' folder on your SD card. There is a download link at the bottom of Ianmacd's post on xda

'[Pie/10][System-as-root]Multidisabler:encryption,Vaultkeeper,proca,etc.'

Download the official twrp.img for the S5e which can be found on the twrp website and move to your 'files for installing twrp' folder on SD card.

6 Patch

Open magisk manager and open advanced settings and tick recovery mode

On right side click on 'install', then in pop up click 'install' then 'patch a file'.

Navigate to the twrp.img on your SD card and select it.

Magisk will patch it and store the patched file in internal storage download folder.

Rename to ''magisk_patched_twrp.img' and move it to folder SDcard.

7 Twrp app.

Navigate to the official twrp app on sd card and install it.

Use the twrp app to backup recovery.img and boot.img to the SD card. (Optional but may be useful)

Still in the twrp app press ''twrpflash' and then 'select file to flash' then navigate to SD card and the 'magisk_patched_twrp.img'. Flash this image and then turn your tablet off.

8 Boot into twrp recovery.

Press volume up and then power. Continue to hold both buttons until the twrp launch screen appears. The boot screen my cycle a few times before twrp launch screen appears.

9. Multi disabler

.

!!!!!!!! DO NOT INSTALL MULTI DISABLER. AS OF OCTOBER 2020 IT CAUSES TABLET TO HANG FOR EVER ON SAMSUNG SCREEN !!!!!!!!!

You do not need it. Everything works fine without it

10 FORMAT.

Click 'wipe' and then 'format' and then type 'yes' this will factory reset your tablet and reformat the data partition so twrp can read it.

Now click 'home' (looks like a little house), on the navigation bar, then 'reboot', 'reboot recovery'

11 Setup.

Skip everything except the wifi login. When setup is complete reinstall magisk manager from your SDcard, open it and let it do its stuff to complete root.

Now it's all done, check everything works and then reinstall your backup and login to accounts.

WARNING.

THIS INSTALLATION ALTERED A FEW THINGS ABOUT MY TABLET

1,When I have been using it rooted and turn it off and then plug the charger in it seems to remap the power button

Now turning on by just pressing the power button it boots to recovery (rooted mode), instead of having to hold power and volume up.

Also the tablet boots to recovery when the charger is plugged in.

2. To return to normal unrooted system I can either use titanium backup or twrp to reboot system. (Also I think clearing the cache returns the power button to normal.)

Now plugging in the charger causes partial startup but then settles down to just the battery gauge as normal and power button boots normally to unrooted system.

3. Adb was unable to connect properly (said tablet was offline) until I cleared the cache. Then all was fine

Everything else works as normal.

If there is anyone who knows why these things happened I would be very interested.

These are the versions of apps that I used.

MagiskManager-v7.5.1.apk

Magisk-v20.1.zip

Twrp-3.3.1-5-gts4lvwifi.img

Multidisabler-Samsung-2.2.zip

UK Firmware Jan 2020 T720XXS1ASL3