For a very long time, the best option for storing and transferring large multimedia files was via an optical media device, such as a CD-ROM, DVD-ROM, or Blu-ray disc. This was a fairly inexpensive option, but physical media was often susceptible to damage.
Another option was through an external hard disk drive. This was another inexpensive option, but again the physical hard disk was susceptible to damage.
Cloud backup has given us another option to ponder. Cloud backup is a subscription based service that offers the user the ability to backup data automatically and provides offsite storage of the data to ensure recovery. The cost of Cloud backup can become pricey depending on the amount of data that you need to save to the Cloud.
I think many multimedia developers may begin to opt for Private Cloud Backup. Private Cloud Backup uses software to save data to a device located on the users network. Files can be copied automatically and authentication can limit the users that can access the data. Local network transfer tends to be quicker than the Internet. Network storage devices can be cost prohibitive and need to be configured on the network, but I believe they are worth the time and investment so that files are securely accessed by only the people that need to have access to them.