full filesystem /usr and /opt

my /usr and /opt filesystems are getting full. I enabled ssh and i can see the filesystems are very small in general

Filesystem                Size      Used Available Use% Mounted on
none                    276.0M    248.6M     27.4M  90% /
/dev/loop0              102.5M     94.0M      8.6M  92% /usr

so the general filesystem is only 276.0M on my 10Tb Nas system

What can i do the make the filesystem healthy again or make it larger in size ?

I allready cleared /tmp folder and removed /var/log/.bak and .old files

Unless you have some random app writing in there, no need to worry, as these are just big enough to fulfill their purpose.

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i adjusted our monitoring parameters to your comment, i also noticed that there is almost no grow over time so thanks for the respons

To help us troubleshoot the issue more accurately, could you please provide your NAS model and the current firmware version? Thank you for your cooperation!

i am using QNAP TS-832PX with firmware QTS 5.2.7.3297

I would like to clarify a bit further: besides the high percentage observed in the readings, have you encountered any actual issues or performance lags during operation?

Thanks!

No, no issues encountered yet .. only the fact that there is so little free space