DxBox is a demo application builds on top of DxChain Testnet v0.3.6. It serves as an interface which simplifies the process for users on file uploading and downloading. The application uses the client-provider model for data transferring, where the client is a node that uses DX Token, the DxChain cryptocurrency, for file storage, file uploading, and file downloading. Provider, on the other hand, is a node that provides storage services with disk space to get profits rewarded by the client. To become a provider, the node must make an announcement, which will be added to the blockchain.
First of all, it's not clear what happens when one (or 1000 !) providers leave the network (temporarily or forever). Is there a way to ensure that users' files don't get corrupted or missing?
Second: Dropbox is quite well integrated in tools. From "camera uploads" that works (while some competitors still have issues) to applications that can link with Dropbox account for sync... I think that maybe Google Drive can compete with that, at least on Android. Even if first problem is handles well, there's still a lot of work before DxBox will have a chance against Dropbox.
The first part of your question sounds a bit technical and requires a tech person perhaps the dev to provide actual answer. I have get in touch with the team and i hope you get response asap. It is true there is a lot of work for DxBox since it is still in developing stage. I believe if BxBox can have the right tools as you stated here, it would be the perfect solution to cloud storage problems.