I’m looking for recommendations for an online data backup company who supports network attached storage devices. I have a Western Digital My Cloud that we use to store our pictures on. The drive is, of course, physically in our house. I’d like it backed up to an online vendor to guard against both drive failure and drive destruction. It seems I read somewhere that most commercial services are designed for computers only and may not work with a stand-alone networked drive.

Is anybody already doing this?

I've used Cloudberry Labs (now called MSP360) software to back up to an AWS S3 storage account. The software can back up NAS and there is a 15 day trial software before purchase ($49.99). AWS S3 is really inexpensive cloud storage.

MSP360: MSP 360 Link

AWS S3 Pricing: AWS S3 Pricing Link