Update and new features

Hello, thank you very much for letting me be part of this magnificent community.
I bought a WD NAS Firmware a few years ago. My last software update is 2.3.02 with MioNet version. Do you know if I can put any more recent? In this version I did not let that some users could upload content but not delete the content of the others … It only allows reading or total control. Do you know if I can do something to do that a manually created user, can upload but not delete content?
Thank you very much

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