Is it possible to access data while a device is on bootloop? I own a Samsung tablet (GT-n5110) and it is in bootloop. I don't have a data backup (yes, I'm an idiot). It isn't totally bricked, so I can access recovery mode (HOME+VOLUME UP+POWER), but before wiping it to factory configuration I am desperatelly trying to back it up. It isn't rooted.

I use linux (ubuntu), but I am open to trying to access it through Windows if anyone thinks it's easier (in spite both ubuntu and android are unix, right?). I've read in many foruns that it is possible to back up an android device through ADB tools in linux, but my device isn't recognized with $ sudo adb devices

I have alredy updated UDEV rules with the correct idVendor and idProduct and I have alredy reinitiated ADB server.

When I connect the device to the computer, it recognizes the tablet but says it cannot access it due to a MTP problem (this alredy used to happen before the bootloop, but it didn't bother me as I didn't use the computer to back the device up as I should have done). I have alredy installed and updated mtp-tools, but still receive the same message.

HERE IS MY MAIN DOUBT: IT DOESN'T WORK 'CAUSE I AM NOT CONFIGURING ADB CORRECTLY OR BECAUSE ADB CAN'T ACCESS A DEVICE ON BOOTLOOP?

Is there a way for ADB to recognize and access this device? Should I keep looking? Or is it simply impossible for a bootlooping device to be recognized though ADB or any other tools?

Thanks A LOT, I really need this help!
USB DEBUGGING CAN BE TRIGGERED BY PULLING OUT THE BATTERY... 

If you have a built-in battery, You need to force a reboot by holding all the buttons on the device simultaneously for 30 seconds...

Try to remove the battery and replace it,   or force reboot ...

This will or should enable ADB Until boot logo starts to loop .. It will only enable it for enough time to check the settings and then disable it.... This means you can only run one segment of adb commands, So type them out first or just paste the following in CMD with ctrl+v

adb wait-for-device 
adb pull /data