How to back up/make read only

Hi MYOB team,

I have closed my business and need to make my file read only/ and or have a copy on my computer.  Everytime I back up it says it's on Icloud and I can't find it.  If i Unsubscribe will my MYOB account right be 'read only'?  

I tried to follow other threads and downloaded the MY AR server edition.  To try to import into it but, can't seem to do it as everything is too confusing.

Thank you