What are some alternatives?
When comparing FileApp and Touch Copy, you can also consider the following products
Documents by Readdle - A central hub for all your files.
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)
iFile - If you need a new file manager for your device, iFile might be the answer you seek.
iExplorer - iExplorer lets you easily transfer music, playlists, text messages, files and more from any iPhone, iPod, or iPad to a Mac or Windows computer and iTunes.
GoodReader - With GoodReader on your iPhone, iPod Touch or iPad, you can read virtually anything, anywhere.
i-FunBox - Founded in 2015, Appholly Technology Co., Ltd. has experienced capability to develop product, manage, market and publish apps and games as well.