did a clean phone swap from my s7 to s8 after backing up then doing a transfer of apps and data etc ... the apps worked ok, but I suddenly found 6-7 old novels back in my library that I'd deleted due to the still missing older chapters (and no Ck i haven't forgotten but UK paperwork takes a bit of time ) seems it finds old folders/ or hidden ones luckily they haven't noticed anything lost, but it was odd getting those novels back as it was a back up to was done before on a clean win 10 pro >then backed up > installed to the s8 , and it seems there must have been hidden folders with older data , i did fix by just deleting them again but not fully checked if i missing stuff