Do you want to back up your data ? I can help you with that. If you have some important data in your computer like documents, photos, music and videos etc.. you should back up these data regularly to avoid data loss due to hardware failure and system failure.. External storage device is an option to back up your data but you will have to spend some money for that. I can suggest some good free alternatives to that.. even if you have external drive you should back up your data at some online secure site so you can assess your data anywhere.
All of the above sites are good options for your data back up. depending upon your needs you can select any of above. if you want unlimited online storage you can upgrade your account. For more information click on the links and visit their sites, you will get more idea there. you will have to sign up to get your free space in all of the above sites. but you will not need to give your credit card information in any of above sites. your name , E mail address and username that's all they need. so start backing up your data.. Enjoy..

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