The Files app is waaaaay better in iOS 13 and iPadOS. It adds external USB storage support, so you can plug in anything from a hard drive or USB-C stick to a synthesizer that can mount as a USB drive to load samples and presets.
Apple’s built-in file-management app adds column view (with a handy preview) and all the metadata you want to know about a given file. And it also benefits from a massively upgraded search feature.