Total Commander is the latest must have app for Windows Phone users. Apart from your standard file browser for files stored in the device memory and on the removable sd card, it is loaded with a lot more features.
You can add an FTP server, your Google Drive, OneDrive, Dropbox, LAN, WebDav. You can also receive files on your device using WiFi. There is also a pack and unpack option for zipped files
Now instead of 8 different apps to perform the above functions, only one is needed. The app is available for free on the store.