If you're having trouble with a specific feature, let me know: What and iOS version are you running? Are you trying to connect to a Windows PC, Mac, or NAS ? Is there a specific error message popping up?

If you want, I can:

FE File Explorer Pro is a robust third-party file management application for iOS and macOS that bridges the gap between local device storage and remote network resources. While many users search for "IPA UPD" files—shorthand for updated iOS application archive files—it is important to note that FE File Explorer Pro is a paid application officially distributed through the Apple App Store for $4.99.

A: Yes, using apps like “IPA Ranger” or “Extractor” on a jailbroken device. On non-jailbroken, you can use iMazing (Windows/Mac) to download a backup IPA of apps you own.