Transfer file storage module from old version to new version of a website

Dear All, We have a website writting in Laravel 5.0. That we store file in B2 backblaze ([login to view URL]). We have made a module to store (upload/download) files in backblaze in the old version of website. But now have a new version of website and we need to transfer this module into the new version (integrate this to the new version). I attached this module in the attachment. This module have times worked well in the old version of our website. But now a small errors occur during download and delete files from the B2 bucket so we need to recheck this module during the integration. make sure: - Files upload successful via single upload or multipart upload - File of each user store in different folder in the bucket (B2) - File download work ok - File deletion and remove from Trash work ok - When we delete a user => whole file of that user (their folder in the bucket) will also be deleted You can take a look of B2 file APIs ([login to view URL]) and our module in the attachment Thanks a lot and Best Regards,