You can display the following items:
• Directory
• iWork documents
(iOS6: iWork ’09 documents,
iOS7 and later: iWork ’09 documents and newer)
• Microsoft Office documents (Office ‘97 and newer)
• Rich Text Format (RTF) documents
•RTFD documents
(iOS6,iOS7: zipped file(.rtfd.zip), iOS8:non-zipped; .rtfd)
• PDF files
• Images (QT movie)
• Plain text files (*1)
• Comma-separated value (csv) files

And you can decompress zipped files. (*1)
(Also Unzip with a passworded zip file)

File management:
Copy / Move / Rename / Create a new folder / Delete / ZIP / Email attach
(Copy / Move / Delete / ZIP / Email attach / allow multiple selections)

[File Transfer]
Supports iTunes file sharing.

[iCloud Storage]
drop on files and folders / delete / file browse / unzip to local / copy to local

[ i button ] (iOS 6 or later)
Show the memory(RAM) usage progressively. (iOS 6 or later)

*1(plain text and Unzip):
Supports the following encoding.
UTF-8, UTF-16, Shift_JIS, Win Cyrillic(CP1251), Win Latin1(CP1252), Win Greek(CP1253), Win Turkish(CP1254), Win Latin2(CP1250), 8-bit ISO Latin 1 encoding, 7-bit verbose ASCII to represent all Unicode characters, Classic Macintosh Roman encoding, ISO 2022-JP, EUC

Usually Doc folder (+iCloud Storage, zip, unzip, memory usage) iOS app used & searched for

icloud email app, icloud files, icloud mail, icloud email, icloud mail app, text memory, and other. So, download free Doc folder (+iCloud Storage, zip, unzip, memory usage) .ipa to run this nice iOS application on iPhone and iPad.