Duplicacy is a free-for-personal-use cross-platform backup tool with a stack of professional features. There’s support for backing up to Dropbox, Amazon S3, Backblaze, Microsoft Azure and Google Cloud Storage, as well as any SFTP server or your own local disk. Backups are optimized for extreme efficiency. File and block-level deduplication means Duplicacy doesn’t waste time storing multiple copies of the same data, and the incremental backup scheme ensures the program only backs up what’s changed. Simplicity is also important. You don’t have to understand or even care that backups are incremental, because they all behave as though they’re full images… [Continue Reading]