IDrive: The top choice offers a free account with 5GB (gigabytes) of storage. $59.50 gets you 1TB (terabyte), with no limit on the devices. Optional private encryption key ensures that only you will have access to your files.
SpiderOakONE: The focus here is privacy. With some of the same assurances as IDrive, SpiderOakONE maintains a Zero Knowledge philosophy. A 60-day, 2GB trial unfolds into a graduated pricing program depending upon storage needs.
CertainSafe Digital Safety Deposit Box: With its use of MicroEncryption, a bulk data breach of your files stored here is virtually impossible. File sharing with guests and other users is also doable.