Dropbox has been around for awhile since 2007 and has a lot of users, me being one of them, which made choosing them to look at more in depth an easy choice. Dropbox starts out with a free 2GB service if you sign up, but there are different ways offered by Dropbox to increase that free space, the easiest is to have your friends and family sign up and say you referred them. You can also upgrade to Dropbox Pro which for $99 a year or $9.99 a month you can get 1TB of storage. Dropbox will save pictures, video, documents, presentations, music, or anything else you would want backed up. Dropbox also allows you to send your files to other people easily and if you choose password protected.
Dropbox is a very secure cloud service, but it does require a password to be set, so the real security depends on the user choice of password and how often they change the password. Also since Dropbox can be used across all devices, from computer, phone, or tablet, if one is lost you can disable the automatic log on feature from any device and change your password so the thief can’t access your files.