The iDrive service comes with backup clients for nearly every PC and device, including Windows Phone—a rarity these days. The company provides additional storage for syncing all your devices and PCs, allows sharing of files with anyone, and has the ability to back up to a local drive. The company also has several affordable pay plans. For all the details, read our full review of iDrive. 
Free or paid, we highly recommend that you back up at least your essential data   against theft, malware or ransomware, and natural disasters, not to mention user error. Even if you work online, a local backup is a lot quicker to restore. And this goes beyond PCs: We get a lot of emails asking how to get data back from a stolen phone—the users generally don’t like the answer. 

Bitcasa starts you off with 10GB for free, but $100/yr throws the floodgates open and gets you unlimited storage for anything you want to sync, share, or back up. Plus, you can connect as many computers or devices to your account as you choose, so you don't pay by the PC. It's client isn't quite as robust as some of the other tools here, but if you're more interested in a flat fee for unlimited space and you can handle the details of which files go where and when, it's a solid option. You can read more about Bitcasa's pricing here.
The next page will show a list of all Google products associated with your account whose data can be backed up. All of them will be selected by default, so make sure to unselect all and select only youtube. An easy way would be to untick the "Select All" button at the top which will unselect all items. Then scroll down and check the "YouTube" option.
As one of the best YouTube video downloaders on the market, Jihosoft 4K Video Downloader supports downloading videos from almost all video streaming sites (such as YouTube, Facebook, Twitter, Instagram, Vimeo, Dailymotion, etc.). What sets it apart from online websites is that it allows you to download entire YouTube channels & playlists and save them in HD, 2K, or even 4K quality. In addition, it has a one-click download mode that can apply your settings or preferences to all downloads, which will greatly save your time and energy.
Of course these companies aren’t really in it for the satisfaction of knowing your data is safe. Their free versions usually only provide enough storage for essential data, or are lacking some advance features that pros would employ. They hope you’ll love the program or service so much, or find it so useful that you’ll eventually fork over some cash for additional storage or those advance features. 
Many services also offer a feature called versioning. This saves incremental changes you make to files as recoverable snapshots of the file. It's useful in case you need to get back information from an earlier version or if your latest file save becomes corrupted. Services vary widely in how many versions they keep and how long they're saved. Best-in-class services, such as SOS Online Backup and SpiderOak ONE keep an unlimited number of file versions forever.
Real time: Real-time backup means that files are backed up whenever they change, usually upon creation or save. It’s also called mirroring and is handy for keeping an immediately available copy of rapidly changing data sets. For less volatile data sets, the payoff doesn’t compensate for the drain on system resources. Instead, scheduling should be used.
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