Software, services and platforms-as-a-platform provide countless growth, cost and management advantages over rolling out these services in-house. Data reliability is also greater as these services offer greater data redundancy and backups than is usually available internally. As a result, they are highly reliable and data loss is rare. Human error is the main consideration as accidental deletes or changes can be costly mistakes.
The reliability that comes with these prividers ensure that the files you have are accessible should something happen on their side, many of these services do not allow you to recall files you've deleted or rollback to previous versions. Additionally, data portability which will allow you bring your data to a new service should you wish to move on also deserves consideration. Data exporting (for portability) is available in many of the better solutions such as Google Docs, Facebook, Squarespace... However not every solution offers this and as a result this should be a strong consideration when choosing your provider or investement. Third party solutions have started popping up to automatically (daily) backup your data. Backupify is an example of a solution that will backup your Google Docs, emails, sites, Facebook data, Twitter posts and more. These backups are automatic, accesible from any browser and the data can be re-inserted as needed for certain services. Other services such as Spanning Backup keep multiple versions of the same documents allowing you to rollback to a previous version, however it is limited to documents, calendars and contacts.
In short, ensure and demand that you can access your data should you wish to leave and move on to a competitor. Access your risk of human error and implement the backup solution that best meets your needs.
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