Dropbox offers both free and paid services, each with varying options. It is a freeware online storage application that's straightforward and comprehensive.
Here are some screenshots to illustrate the features and user interface of this application:
Store and sync files on the cloud and also share any of them with friends over the Internet. Screenshot of Dropbox - 2004px · 1375pxMake backups, share files. Screenshot of Dropbox - 2004px · 1375pxFree cloud-based storage. Screenshot of Dropbox - 2004px · 1375pxStore, manage, and share. Screenshot of Dropbox - 1104px · 1505px
Google Backup and Sync
Google Drive
MEGAsync
Microsoft OneDrive
CloudBerry Explorer for Amazon S3