Files from Google
Files by Google is a really clean and simplistic looking file manager app which comes with no ads at all. The best part it that it comes with a file-sharing feature built right into the app. You can share files with other Files app users without consuming internet data. You can share larger files at such high speeds. Files app got three tabs at the bottom bar which includes; the File Manager, a cleaner feature, and the Share feature. You can file between smartphones with the Files app installed on it. As this app comes from Google, you do not have to worry about the security of your private data. Download
Send Anywhere
Send Anywhere is again a dedicated file-sharing app that can share files between devices quickly and easily. This app can transfer any file type without compressing or altering the original file. This app has a password feature that needs to be entered for file transfer. It uses WiFi direct to share files so it won’t consume any data. This app also shares the files online so it can be shared with the person or device which is not near you. You can easily share the link of the shared files via any social media or messaging app. This app uses reinforced 256-bit file encryption so your data stay safe and only the desired person can access it. Download
SuperBeam
SuperBeam is one of the first apps which used the WiFi direct feature to share files between two Android devices. This app shares files quickly and it is the most secure way to share files between devices. It has a QR code feature so the other SuperBeam users can start eh transfer quickly. SuperBeam uses WiFi direct feature which quickly transfers files between devices. You can pair the devices using the NFC or the QR code feature. It keeps the history of all the transfer operations in the app for convenience. There are a bunch of themes in this app including AMOLED friendly dark theme as well. Download
Wrapping up
These were the alternative apps which you can use instead of all those Chinese apps which Google removed. These apps are not Chinese so you can use them without worrying about getting removed from Google Play Store in any future.