What are some alternatives?
When comparing iFile and Filza File Manager, you can also consider the following products
FileApp - FileApp is an iPhone and iPad File System and Document Viewer.
Touch Copy - TouchCopy - Copy Music, Messages, Photos, Notes and a lot more from your iPod, iPhone and iPad back to your Windows PC or Mac.
Decipher Backup Repair - Fix corrupt and buggy iPhone backups so that you can restore your backup in iTunes!
iMazing - iMazing lets you transfer music, files, messages, apps and more from any iPhone, iPad, or iPod to a computer, Mac or PC. Manage and backup your iOS device simply without iTunes. (was DiskAid)
Files-finder edition - If you have to name one app which you miss most on your iPad, what would that be?
Files - Keep everything organized without breaking your flow. Dropbox brings your files together, in one central place. They're easy to find and safely synced across all your devices—so you can access them anytime, anywhere.