What are some alternatives?
When comparing GoodReader and Filza File Manager, you can also consider the following products
FBReader - FBReader is an e-book reader for various platforms. Features:
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.
calibre - Ebook manager, viewer & converter
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)
Amazon Kindle - Amazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and...
PhoneView - With PhoneView, you can view, save and print all of your iPhone and iPad messages, WhatsApp messages, voicemail and other data directly on your Mac. Save your SMS, iMessages and WhatsApp messages.