auto move `/data/log` files to sdcard? or link it?
If your device is rooted, you can try creating symbolic link from the folder to SD Card (this is essentially what Link2SD does to apps, with prettier interface) using the Terminal Emulator.

Helpful Commands (disclaimer: untested, use at your own risk, make sure you understand exactly what the commands does before running them)


Get root su
Copy the folder to sdcard cp -r /data/log/ /path/to/new/folder
remove the original folder rm -r /data/log/
Create symbolic link use ln -s /path/to/new/folder /data/log
Reboot and test. Until you reboot, old processes may still own a handle to the old files even though it had been removed from the filesystem.


Note though, /data/log generally should not use too much space, so moving this folder likely won't save too much space. If you have an unusually large log directory, you might want to investigate that instead of moving the log directory.