I have bad news for those of that own one of SanDisk's Ultra +Cloud USB 3.0 flash drives. The company sent out an email earlier today, letting +Cloud customers know that the online storage service would not be available after Friday, May 13th.
Hi SanDisk +Cloud customer,
Unfortunately, the SanDisk +Cloud online storage service will no longer be available after Friday, May 13, 2016. You are receiving this message because your email address is listed as a registered user of this service. We very much regret and apologize for this disruption.
If you have data stored in your SanDisk +Cloud account, please download your data to a separate storage source before Friday, May 13, 2016, after which point it will no longer be available. If you are having trouble retrieving your data, please contact our customer support team.
At this point, we're not really sure why SanDisk would shut down the service after only a few months. The company is trying to make it up to +Cloud users by providing them with a prepaid debit card to cover the cost of the product as well as a 128GB SanDisk Extreme PRO USB flash drive.
Update: We've learned that this is due to Bitcasa's decision to discontinue their Drive service, which was the basis for SanDisk's +Cloud service.