Clear "Other" data on iPhone
First of all, are you sure you need to clear this data? iPhones manage the "Others" category alone and should "release" the cache when space is low. 


  If the mentioned options are the only ones I have, what would you advise me to do and why?


I would choose the backup &amp; reset option so you don't have to dig into the files and the cache will be the smallest possible.