Don’t know, maybe using the WIndows sub system read here
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I highly recommend TWRP for backups on FP3. But be careful, there are many ways you can shoot yourself in the foot! See my post at Backups, bootloader, root
just to be sure: I left /e/ since a few weeks, but on a NON root lineageos 17.1 I was able to start a root shell via adb and had access (w/o encryption) to the whole data partition. Wouldn’t this be possible in /e/ too?
Give it a try:
adb root
adb shell
seems to work fine (on windows 10 Pro N)
so if I copy this folder to my desktop pc I have a full backup which can be placed back on an upgraded FP3 ? And with upgrade I mean Android Q 
Ok So here is another documentation on how to back up the phone for the case that something goes wrong. However, I don’t think that someone has successfully tried to restore the Userdata after an upgrade to Q. YET.
I went for a clean install of Q last night.
not yet fully finished but I can work again
I’ve also installed TWRP so when configured I can take a first backup of my device.
Overall I’m not yet convinced to advice an upgrade to Q on a FP3.
It’s a lot slower than Pie and I also have some issues with my 2nd SIM (which is brand new).
On Pie the coverage was okay for this SIM, on Q I have a weaker signal (as in No Connection) in rooms where there was a signal on Pie…
Also Exposure Notifications seems not to be available (and this was one of the reasons for upgrading to Q, besides the new camera modules, which I will install tonight).
In general or somewhere in particular (some App or UI element)?
I can’t confirm in general, my phone feels like before in this regard.
It seems to me my battery life improved noticably, but will have to check more.
I’ll just have to wait a bit
In general.
Rebooting the phone takes now a lot more time. Fairphone boot screen takes up to twice the time it used to on Pie and the /e/ logon screen even up to 3 times…
It really feels like all apps are slower in opening and closing. I already disabled animations and that improved it a bit.
All apps are working fine though.
Did you make any progress in finding a solution for upgrading to Android Q while keeping your userdata?
Nope, … unfortunately not
Yes, this absolutely works on FP3 in both Pie and Q. I’ve used it to transfer most of my data.
I’ve typed up some scripts here: https://gitlab.com/pkerling/adbrootbackup/ maybe it’ll help someone.
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