iFiler

iFiler is a file manager for iPhone. iFiler can transfer files through Airdrop, and can read files(including the extension format of *.txt, *.pdf, *.rtf, *.doc, *.xls, *.ppt etc).

iFiler is like the Resource Manager on Windows, it's able to go through file(s) you want to see.

iFiler is also like a Finder on MacOS, it's capable of browsing the directorie(s) and file(s) through 'root' directory.

In additional, use Airdrop transmits files between MacOS and iPhone in a easily way in this app

If you runs iFiler on a jailbroken iPhone and it works well more than a unjailbroken iPhone.