@guidol: Here is the picture you requested.
My standoff skrews look a bit diffrent compared to the ones you used.
I also added a bit of tape between the coil ant the ethernet port is has contact to.
It is powered by the 3Amp Power Supply supplied by Orange Pi.
After starting over with a fresh build I tried syncthing instead of Nextcloud.
Not exactly doing the same thing, but good enough to use it as a phone backup cloud.
Was hitting some errors when large amounts of pictures were synchronized.
This happens if I add a new phone to the cloud:
Message from syslogd@localhost at Oct 25 22:29:05 ...
kernel:[ 4736.779625] Internal error: Oops: 5 [#1] SMP THUMB2
Message from syslogd@localhost at Oct 25 22:29:05 ...
kernel:[ 4736.885415] Process syncthing (pid: 1805, stack limit = 0x212b8102)
Message from syslogd@localhost at Oct 25 22:29:05 ...
kernel:[ 4736.891691] Stack: (0xc3641e28 to 0xc3642000)
Message from syslogd@localhost at Oct 25 22:29:05 ...
kernel:[ 4736.896063] 1e20: 001a1ea6 c0f2a9c0 c0e08bc4 c0e04d48 006000c0 c0213275
Tried a few things to figure out the issue:
Lowered CPU frequency to 648MHz.
Tested RAM with memtester.
Wrote a few gigabyte to the msata SSD via dd.
Switched from eth0 to usb ethernet.
--> All with nothing looking problematic. Say - it all worked without errors.
Then watched htop while adding a new larger folder to the sync cloud --> System looked frozen (Actually was just terrible slow).
htop looked like this indicating that I was running out of memory:
pi@orangepi:~$ htop
1 [||||| 13.4%] Hostname: orangepi
2 [||||||||| 27.2%] Tasks: 24, 149 thr; 2 running
3 [|||||| 16.2%] Load average: 3.10 2.34 1.25
4 [||||||| 16.3%] Uptime: 1 day, 12:51:08
Mem[|||||||||||||||||||||207M/239M] CpuFreq1: 816 MHz
Swp[|||||||||||||||||||||119M/120M] CpuFreq2: 816 MHz
Cpu Temp: 37 C CpuFreq3: 816 MHz
Added a 512M swap file to the SSD. Now it seems to run stable.