Sony walkman NW A306 firmware update -greatly reduces the already small capacity

[vasilisnik]

Hello.I have  NW  A306  since  December  of  2024.I  do not  remember  what was the initial available capacity but  i notice ,that each  firmware update  take  about 2-4 GB  of  space.For  example  the  latest  update  which  i installed  today  take  another  2 GB.So  now  is  available  only 13GB  of  32 GB!!!!  in just only one year!!!( Just  the  system  and  the files of it take  14  GB of  space!!!The  default factory apps  about 3 GB.And all my music  is  saved to micro sd).Given that it has a capacity of only 32 GB ,if it continues and receives updates or gets an upgrade to android version 15, in 2 years,or sooner there will be no free space at all!!!!!!What can i  do?As  i know  i  can not  transfer the apps  to micro sd.By the  way,  the  default  free  space after  unboxing,  without  installing  anything ,how much is it approximately?

[TheRealOG]

@vasilisnik 

Based on Sony's website, the software size is 1 463 MB

It's mentioned here: Software version