I can confirm that issue.
I didn’t change anything, I noticed it because my synchronization stopped working
It seems like a quite spread issue then. Right now I don’t have tim to find a solution myself, but it’s been days since a last could sync my calendar and contacts, maybe I’m going back to nc15 for now
Is this problem solved automatically with v1.16.7 (2019-09-11) Increased modsecurity bodynofileslimit so larger files can be synced (#993)? Or is this something else oO
it is not about filesize, it’s about wrong tmp directory link
Where / how to fix?
@DystopianLphant fixed it by modifying the tmpdirectory-path in config.php (see here). But it’s not working in my case unfortunately.
I found a solution, which is working on two Raspberry Pis. Use it with caution, I’m just a beginner on this topic.
Procedure
- Locate config.php
cd /var/www/nextcloud/config
- Edit config.php
nano config.php
- Change line for tempdirectory
‘tempdirectory‘ => ‘/media/USBdrive/ncdata/tmp’
(example)
to
‘tempdirectory‘ => ‘/var/www/nextcloud/data/tmp’
The new folder is located on the SD-card and should have following rights
drwxr-xr-x 2 www-data www-data
-
Save and Exit by Ctrl+S and Ctrl+X
-
Reboot the server
-
Test it by transferring a larger file (should work now)
-
Undo the changes in config.php and reboot again (now the temp directory should be located on the USB drive again and transferring should work)
Best wishes!
EDIT:
Also check /etc/php/7.3/fpm/php.ini as mentioned from @OliverV below.
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So the initially set is not wrong. It is just not used correctly. And by setting and resetting it is then used correctly? Do I understand this in the right manner? But that also looks like a bug where a developer should take care of it.
Yes, it’s like a reset of the temp folder. I think it is a bug and a developer could have a look.
It seems like a problem occurring on the Raspberry Pi. So it may be connected to having the temp folder located on an external USB drive, but I’m not a web developer.
Does not work for me 
I’m desperate with this problem
For me downgrading to v15 solved, temporarily, the issue. In the meanwhile you could do so
I had the same problem on my NextcloudPi on Odroid HC2. The solution of @malbreitenbach solved the problem in my case.
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I tried again and even if the tmp path is on the SD card I get the error message (so test step 6). Does anyone have another idea?
Interestingly, I don’t have the problem when I upload using the FlowUpload app. Now I’m completely at a loss. Can someone use this knowledge to draw a conclusion about the problem?
Sad to hear,
for me the problem appeared again, because while an update
/var/www/nextcloud/data/tmp
was deleted. I fixed it by recreating the folder with correct rights. I hope some developer will have a look into this. Unfortunatly I don’t know if it’s Nextcloud or NextcloudPi related.
Good luck!
Edit: Merry Christmas! 
Also check
/etc/php/7.3/fpm/php.ini
In some instances this line:
; Defaults to the system default (see sys_get_temp_dir)
sys_temp_dir = /var/www/nextcloud/data/tmp
Needs Edit to point to /path/toyour/ncdata/tmp
commenting out the line works too.
as
; Defaults to the system default (see sys_get_temp_dir)
;sys_temp_dir = “/tmp”
seems to be default
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it is pointet to the correct path. I commented out anyway and look what will happen.
Fantastic.
Thanks malbreitenbach,
I was struggling with the same issue for days. I have upgraded to RPi4B from the 3B+ version and I was no longer able to upload.
Your post made it.
Great and clear step by step explanation
Kattivius
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fantastic. thanks. I added the path (along to the above changes suggested from @malbreitenbach and I solved all my problems.
Kattivius
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