Thank you nolimitz for detailed steps BUT still I can't figure it out.
After placing dir=/storage/downloads line in aria2.conf, my downloads still go to root directory. What I mean is that after downloading the file if I issue "ls -all" command (at LIBREELEC command prompt in SSH), my downloaded file shows up there and not in /storage/downloads. This has been my problem from beginning. No matter what directory I specify in aria2.conf file, download always go to root directory and not in /storage/downloads.
Could you tell my how to solve this?
After you added the line in aria2.conf , did you restart service?
Are you trying to download using web ui?
Can you show a screesnhot of the web ui?