yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] mayster:
I'm stuck.

I completed points 1 to 4. I uploaded the following files via ODIN: vbmeta_disabled.tar and twrp-3.6.0_11-6_afaneh92-r8q.tar

Now I'm trying to enter RECOVERY MODE to upload multidisabler-samsung-3.x.zip and Magisk-23.0.zip - unfortunately I can't enter RECOVERY MODE. I turn off the phone and then turn it on by holding VOL + and POWER.

The following information appears on the screen:

"The phone bootloader is unlocked ....

press POWER KEY to continue "

later the following information appears:

"SAMSUNG S20 FE

The phone is not running Samsung official software ... "

And then Android starts up normally.

How to enter RECOVERY MODE? What am I doing wrong?
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] mayster:
I turned off the phone. I connected my phone to my computer with a USB cable. The screen shows that the phone is charging as a percentage. Then I pressed VOL + and the POWER KEY. I have entered RECOVERY MODE which looks like in the attached photo. There is no possibility to install ZIP files there (multidisabler-samsung-3.x.zip and Magisk-23.0.zip). REVOCERY MODE doesn't look like TWRP.

I'm doing something wrong ... :(
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] mayster:
I found a solution. Immediately after installing TWRP, disconnect the USB cable and press VOL- and POWER. When the phone turns off, quickly connect the USB cable and press VOL + and POWER. Then we will enter TWRP.

The rest was easy.

Thank you for your help and my regards
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Brose666:
my device doesn't have a oem unlock option in the developer options
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] butchieboy:
If its US Snapdragon there will not be oem unlock
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] ZeljoRenpo:
Hello,

after many tries, the solution from mayster works ...

old:

I have a g780g and followed your guide. When I want to enter TWRP (step 5) with the key combo vol up + power it will enter the stock android recovery. Do you know what's wrong?

Thanks for helping me
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Tendor83:
Hi @Svan987

I have the same model SM-780G (S20FE-4G) and I have the same problem rebooting in the TWRP custom recovery after succesfully flashing it with Odin. I have tried numerous times, but pressing the Volume UP + Power will not put the phone in the recovery mode. It just boot up into system...

I really do not understand how fast we need to be to press at the exact moment the recovery key combo.

Too bad the One UI room doesn't have an Advanced Restart option when pressing the power button, in which we could select: Normal Restart, Recovery, Bootloader, Download Mode, just like some custom rooms have (e.g.: Ressurection Remix).
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Tendor83:
I'm in the exact situation as you, mate.

Same SM-780G (S20FE-4G), and the unexplained inability to reboot into TWRP recovery, no matter how many tries I did to reboot using the indicate Vol Up + Power key combination.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
see your other post
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Tendor83:
Bravo, clever move! 👌🏻

It seems that inserting the power cable after powering on the phone (after the TWRP flash) + the recovery combo keys managed to boot into the TWRP recovery.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] ICECOLDKILLAH:
yes thats true, the power cable is needed to boot into twrp, otherwise it wont work
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Tendor83:
To be perfectly honest, this IMPORTANT step should have been stated in the steps needed to install TWRP and obtain root.

afaneh92, It isn't too late to update these steps with this minor but important detail.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Tendor83:
After following all the steps and successfully flashing Magisk-23.0.zip in TWRP recovery and rebooting to system (steps 9 and 10) it seems that the magisk installation didn't went as expected.

The first sign, in the Magisk manager is says Installed: N/A.

When trying to install Youtube Vanced the Grant Root Permision will return "Root access not granted".

Do you have any ideea why the root process didn't succeded?
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Tendor83:
I have tried to flash magisk_23.0.zip in TWRP and the screen flashed shortly without showing all the terminal commands.

I have taken a recovery.log and searching magisk in it I have found the following code:

Installing zip file '/sdcard/Magisk-23.0.zip'
Unmounting System...
I:TWRP theme zip
Invalid zip file format!
scudo: Scudo ERROR: invalid chunk state when deallocating address 0x007bfe96f420

libc: Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 590 (recovery), pid 496 (recovery)
E:[MTP] twmtp_MtpServer::mtppipe_thread unexpected read_count 0
libc: Unable to set property "ro.twrp.boot" to "1": error code: 0xb
libc: Unable to set property "ro.twrp.version" to "3.6.0_11-6_afaneh92": error code: 0xb
Starting TWRP 3.6.0_11-6_afaneh92-d0b854b3 on Sun Jan 9 17:07:18 2022
(pid 593)
TW_NO_REBOOT_BOOTLOADER := true
RECOVERY_SDCARD_ON_DATA := true
I:Lun file '/sys/class/android_usb/android0/f_mass_storage/lun0/file' does not exist, USB storage mode disabled
TW_HAS_DOWNLOAD_MODE := true
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] butchieboy:
Umm, I thought most were aware of this just as you have to connect the device with cable to boot to download mode also. I guess I was wrong figuring that users were aware of this. But once Magisk is installed you can boot to recovery from there..or with reboot app..or terminal
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] butchieboy:
Why not just flash JKruse AIO
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Tendor83:
No, for me and many others trying to root Samsung devices it was not clear. Luckily an inspired user in this thread documented the whole procedure.

Regarding the magisk, it seems that the flashing procedure was not succesful... So, no root for me and surely no rebooting in recovery from Magisk.

I have documented the error and sent it here.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
if you have your firmware for your phone sitting on your PC this version of 7zip can open both .tar archives and .LZ4 archives

Releases · mcmilk/7-Zip-zstd

7-Zip with support for Brotli, Fast-LZMA2, Lizard, LZ4, LZ5 and Zstandard - mcmilk/7-Zip-zstd

github.com

that means you can go the slightly less painful route to patch with magisk by extracting the boot.lz4 from the AP archive and extracting the boot.img after that.

use magisk to patch just the boot.img on your phone and then flash the patched version with TWRP to the boot partition.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] splendid31:
its not working for me....G781B ...i got fail

and i think u have error in first texte ... flashing twrp and vbmeta_disabled.tar in AP

maybe vbmeta_disabled.tar need to be in user data

am new here ....i want install install twrp to delete internal storage and dwongrade to android 11 from android 12
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] odylight:
Hello same case for me!
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
I think when it fail there is errors in download mode or odin, posting that error makes life easier.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
you only need Odin to downgrade, you can flash normally from 12 to Dec or Nov because they share the same binary number.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] splendid31:
thx bro ...i follow the steps all ..but in odin i had red box and faill in odin ...i thought about flashing twrp and vbmaster in same case ...IN AP case ...its was the problem ... i forget to take screenshot of the errors
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] splendid31:
thx bro ..i was thinking when i install twrp recovry and i delete the internet storage and flash the frimware again ...the instalation will be good without erros ....i don't know if its true
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
reflash again will bring encryption back. just follow instructions in OP
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] splendid31:
ok bro thx
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Tendor83:
It seems not even Google can help me with this enigmatic world "JKruse AIO"... 🤔💭
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] butchieboy:
https://xdaforums.com/t/s20_fe-sm-g...pt-patch-bluetooth-and-fix-safetynet.4241247/
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] twins2000:
I have flashed twrp to my phone via odin and can not enter into twrp afterwards with button combo.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] YMatrix:
Read up, you need to connect the cable after key combo
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] butchieboy:
Use Magisk to boot to recovery
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Tendor83:
Thank you. I found a detailed guide on this russian forum (https://4pda.to/forum/index.php?showtopic=1027599&view=findpost&p=109398039) and eventually manage to obtain root.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
has anyone who has updated to OneUI 4 noticed that the stock recovery still comes back sometimes even if you do everything right ? flashing multidisabler does show in TWRP that the environment appears to be android 11 instead of 12.

i think i'll flash back to 3.1 for now

edit: didn't flash back in the end, tried a few things before deciding just to flash CleanOS and not worry for now. then i saw *****ieboy's comment above. so it's just the key combo that we can't use then it's all OK? strange measures Samsung keep throwing out there. pretty soon it's not gonna be worth the hassle with more and more crap to remember just to get things the way we like it.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Ubimo:
I'm on oneui4 and flashed latest CleanOS Snap 5G. Then magisk beta 24.

Magisk cannot boot into download mode anymore.

Also, the key combo (vol down and power) does not work.

Also, plug in cable and vol down and power does not work.

How do I get into download mode?

Edit:

Ah, found the correct instructions to get into download mode:

Power off the phone. Press and hold vol+ and vol-. Now plug in the USB cable in your phone. When in download mode, press vol+ to continue in download mode.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Victor 3:
I understand that no one can fix TWRP to see the sd card?
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] apaxtc:
Who did you see writing in Russian here? and you want an answer!

don't write in Russian anymore because no one bothers to translate what you want ...
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
not so far, no.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Ubimo:
Backup does not work anymore.

S20 FE 5G stock rom
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] androidlover420:
Can i update to newer version using twrp ?
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
if you use a good file browser on your phone that can open tar files, you can extract the recovery.img file from inside and flash that in TWRP as an image. use reboot to recovery and look for the version change
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 0xNet:
Does twrp-3.6.0_11-6_afaneh92-r8q.tar support SM-G780G (4G) Model?
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
yes
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 0xNet:
Thanks man, btw I'm getting this error message: "only official released binaries are allowed to be flashed(vbmeta)". Bootloader was already unlocked through Developer Options.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
Connect to internet, kg status must be checking
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] androidlover420:
Got it, Thanks!
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] kprasadrao:
Please can you update to latest kernel source 🙏
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Revontheus:
Has anyone else encountered issues when flashing the multidisabler file? I am experiencing this issue below:

Mounting /system_root...
Attempt Faileed. Mounting at /system_root...
mount: '/dev/block/dm-0'->'/system_root': Invalid argument
Even that attempt failed. Aborting...

I have unlocked my bootloader successfully as it says OEM Lock: OFF (U), and I have the G7810 Model. Flashing CleanOS just gives me a bootloop and I can't boot to my OS. TWRP warns me that "No OS is installed" whenever I select reboot to recovery or system.

Any help is appreciated, thank you.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
use my instructions
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Revontheus:
Hello, I am encountering the issue "Only Official released binaries are allowed to be flashed(vbmeta)" when I try to flash it in ODIN.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
connect to internet to change kg status to checking
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Revontheus:
Hello again. I am able to get it working, but after flashing a ROM (Clean OS), I encounter the error Failed to mount '/system_root' (Invalid argument). I tried rebooting to recovery, but the error persists that I cannot mount /system.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
Make sure you are flashing correct twrp r8q and follow all instructions.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Revontheus:
Thank you for your quick reply. Am I supposed to flash Magisk after multidisabler even if I would be installing another ROM?

After typing multidisabler in the terminal, I rebooted to recovery and flashed the ROM, and consequently encountered the issue.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
What rom! If gsi then flash to system not super

Magisk is not necessary.

Its not my problem that you cant flash roms properly and next time add this details. Even if its not supposed to explain how to flash since its twrp thread not rom thread.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Revontheus:
I understand. Thank you very much for your assistance, and apologies for going off-topic.

EDIT: I have narrowed down the issue to the ROM itself. I was able to install Magisk and use the recovery successfully.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
S20 FE Modding

Exynos AOSP: t.me/S20FE_Exy	TurboUI: t.me/projectxs20fe	Prime Kernel Snap: t.me/s20fesnapdragon	Prime Kernel Exynos: t.me/+vpzEK9kPMc41MmY9	Bandido Kernel t.me/bandidokernel	Klimbo Kernel t.me/klimbokernel

t.me
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] saoudien07:
Hello,

I know that it is forbidden to ask about Supported Models, by the TWRP/ Root present in this thread, because it is already stipulated on the main page of the thread.

Is there a way to know, from the system, if any of the said model are Bootloader Locked or not??? why?

I finally have the possibility to get a S20 FE 5G, model SM-G781N, and I would like to know before to buy it, if I will be able to Root it.

I am going to get it from a local store, so I want to know from the system if it is Bootloader locked "forever" like the US version or not.

Previously, I bought this phone, and sadly it was a US version, so Bootloader locked "forever".

This time, I would like, while still present in the store, be sure 100%, that it will be Rootable (sure TWRP first), once I get home with it.

I am planning to turn ON the phone a little bit while in the store, and do a little inspection in the system.

Sellers will not allow me to try Root the phone in the store, nor turn it into Download mode, so it would be great, if I may know for sure from the system, about its Bootloader.

Thx you very much.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
N model has oem unlock toggle
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] saoudien07:
Thx you 😉

I guess, I am safe to get it, SM-G781N model.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] butchieboy:
Just use Magisk
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] saoudien07:
I installed Magisk.zip through TWRP, but the app never appear on.

Then decided to innstall the apk, and still no Root.

Any idea??
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
Use latest 24 on Android 12
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] kay9jay:
I unlocked the bootloader in developer settings and download and also flashed vbmeta_disabled.tar in odin. I CAN flash TWRP, but I need to mash the buttons quickly as stock rom reflashes recovery (I have heard though that TWRP should reflash itself permanently after 1st boot?).

My problems seems to be that TWRP does not see the microsd at all.

I tried mounting it and i tried another microsd (they are both exfat formatted).

The situtation makes it impossible to backup or flash a custom rom. Any help?

I have SM-780G Snap 4G.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
Its known issue, use internal or usb otg
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] jhr5474:
I am using the snapdtagon s20 fe edition and i have tried following your directions but when i try to flash the vbmeta in odin it fails everytime, any ideas?
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] saoudien07:
Thx you, I was used to Magisk 23. My bad

Discovering Magisk 24, and Android 12 hasle

you wont get any help with such poor details...

for start, is the Bootloader unlocked ? With a Locked Bootloader, you wont be able to do anything...

Did you enable OEM in "Developer Options" ? is "USB Debugging" enabled?

maybe provide a pic of Download Mode, before the error occurs.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] jhr5474:
And as I said I followed the directions, so why would my bootloader be locked? Anyways, problem solved. Enjoy, being unhelpful to people.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] arlequin2k3:
With the S20FE we can no longer juggle with twrp as we did with the previous phones . So I opted for Swift Backup and it works great to backup all your android on an sd card.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] saoudien07:
Hi, I am struggling to enter into TWRP recovery, right after its flash.

Thx for any additional tips on how to enter into TWRP.

Edit: Resolved
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Ubimo:
Power down the phone.

Press Vol+ & plug in USB cable, which is connected to the PC.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] kprasadrao:
Please Please 🙏 can you update to the latest kernel source I am waiting for so many times, this smartphone gets an android 12 update🥺🙇‍♂️🙇‍♂️
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
this current version works fine on OneUI 4/4.1
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] LouisPhilippe:
Hi all.

I have a Galaxy S20 FE 5G SM-G781B/DS.

Once rooted, is the unlock of apps (like banking apps or other apps) with fingerprint works ?

Thanks.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
that will depend on the app, if you successfully hide root from your banking app it should work fine. there are a few banking apps that are harder to hide magisk from, they look at more things or the request root access to test the system.

it's probably quicker to search for the names of your apps plus magisk hide.

not really the right place for this question.

make a thread in the questions and answers section or even better in the android general section, then ask if your specific named banking apps work for others if you can't find the info yourself.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] bartko4321:
hello backup works ?
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
yes it does both to internal storage and OTG storage. microSD are not able to be detected
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] G4b0r:
Hello, is the SM-G780G/DS the same as G780G? All I know is that the DS model is Dual Sim, but idk if it's any different.

Also does rooting delete any data?
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] 3mel:
as far as TWRP goes they are the same yes.

rooting does not wipe data but unlocking the bootloader does and flashing multidisabler (so that twrp isn't overwritten) requires a format of the data partition afterwards.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] VampiruX:
Error
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] VampiruX:
Hi,

I tried to root, but stopped on the first try: Unable to install "vbmeta_disabled.tar" with Odin 3.14.4. Odin says "failed" and on the phone I got a message "Only official binary are allowed… " on the S20. Before starting I have unlocked the bootloader, I get the warning message when it starts.

Can someone give me a direction to look for ? Many thanks.

PS my device is S20FE 5G, SM-G781B, FRENCH (FTM), G781BXXU4FVC4
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
C

Connect to internet and open browser
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] VampiruX:
Hi,

On my first attempt, I got a strange thing: when I connected my phone to my PC after unlocking bootloader, Odin didn't see the S20 and nothing happened. So I removed the cable, stopped Odin and restart the phone-in download mode, and Odin saw the S20, but it didn't work as I reported in my preceding post.

As I didn't understand, I redid all, re-locked bootloader to be in basic state when I got the s20. And now, all is OK.

I tried to use OTG on a USB key to put vbmeta, multidisabler and Magisk but TWRP didn't see these files, I have to use a PC and transfer files to phone.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] VampiruX:
I confirm that TWRP doesn't recognize OTG device. I booted in recovery and tested with File Manager: there is a folder called "USB-OTG" but it doesn't see any file in this folder. I tried to connect to the PC, and it is the same. But from the PC I can see the internal storage of the S20.

Any idea ?

Edit1: I tried several USB keys usable by Android (FAT or exFat) and all are the same. Finally, I tried with a small card reader able to directly read a micro SD card and it worked for TWRP backup, but also for reading files to restore. (I didn't make restore test, it's enough for today. )

I think that not all USB storage devices are suitable for TWRP (or to the S20FE), we have to check before making a backup.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Juan Inzunza:
Hello newbie here, when i reboot to twrp after flashing it im geting a bootloop, the twrp logo show up and then the screen goes off one time every 2 seconds, i can only boot to the system if i shut down the phone and then flash twrp again with the auto reboot option checked in :c.
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
post your software info and twrp version you flash, I hope its not old build
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] Juan Inzunza:
twrp-3.4.0-1_afaneh92-r8q
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
Too old twrp, flash latest 3.6
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] VampiruX:
Hi, finally I bought a micro card reader dedicated to S20 backup, and ...

It doesn't work on S20 SE 5G with TWRP. In backup it doesn't accept to OTG. It works well on my PC with the same micro SD card inside.

Any idea ?

A question for Afaneh92: I use "openrecovery script" to automatically back up the phone with Tasker, but what I have to use to back up all partitions on the phone ?
[Samsung Galaxy S20 FE ROMs, Kernels, Recoveries, &] afaneh92:
I can answer TWRP side, is it crashing on read only partitions, like apnhlos!