In spite of the incredibly frustrating responses from these techs -- who appear to not thoroughly look at the informative pleas for help by repeatedly asking questions already answered in the inquiry...
I have found an amazingly Simple solution!!....
Go to Settings > device maintenance > storage > documents > select (all pdf and others you don't want) > delete.
That's it!! So simple!! Less than 2 minutes! Done!!
.... and I am a 55 yr old country bumpkin with absolutely NO computer or tech training!!!
Oh my gosh. This has plagued me for a year and I finally decided to search for solutions. THANK YOU. I cannot believe a customer support tech couldn't have given this simple solution. Thank you so much, Christian B-T. We sound very similar. I am a 52 yr old
mom who manages the phone IT issues for our family.