A free app for Android, by Ascico Studio.

LinkBox is a secure cloud storage that can be used to upload and transfer files between devices and share them with anyone. It supports sharing folders with your contacts and seeing their updates in real time. It also supports advanced playback functions, such as speed adjustment, screen size adjustment, subtitle adjustment, and floating window.

You can sign up for a free account and get free storage. It can be used on all your devices (web browser or app), no matter where you are.

LinkBox supports multi-terminal access to any file in your account, previewing video files without special software. It can be used on all your devices (mobile phone or computer), no matter what type of files you want to upload. It can be used to upload photos, videos, audio, and documents. 

It can be used to share folders with your contacts and see their updates in real time. 

LinkBox supports searching for files by name or content and can be used to sort files.