The Czech Centre for Phenogenomics, Czech node of the European Mouse Mutant Archive (EMMA) is offering free archiving of mutant mouse strains. (phenogenomics.cz)
Amazon's Worry - Free Archive automatically backs up your books and highlights online in your Kindle library where they can be re-downloaded wirelessly for free, anytime on any Kindle device or app (phx.corporate-ir.net)
Free Cloud Storage: Books purchased from the Kindle Store are automatically backed up for free in the Worry - Free Archive where they can be re-downloaded wirelessly, anytime. (goodereader.com)