Dropbox, iCloud, Google Drive, OneDrive

• .The table compares prices (monthly payments):

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• Dropbox is the most used but are too stingy for only 2 GB. Despite the fact that in the beginning, they will be offered a lot of volume through promotional activities such as the purchase of the phone, using functional descriptions, upload pictures ... but that space will disappear after about 1 to 2 years and you will quickly return to the original level is 2 GB (donated space to introduce and Camera Upload is not lost). If you want to use more than the lowest package of Dropbox is $ 9.99 / month for 1 TB, and the next package is USD 15 / month unlimited capacity.
• Apple's iCloud 5GB free still nothing changed from last year, this default 5 GB for storing the iPhone and iPad backup, archive photos ... so when we want to actually use it then only space remaining 1 or 2 GB, even not at all because the backup was some misappropriation of all, it takes the delete. However, if you take away the $ 0.99 / month (~ 22,000), it will have even more to 50 GB for storage. 50 GB is a lot and enough for most users, used for storing photos, documents and backup. All three remaining opponents starting charging at higher rates.
• Google Drive and OneDrive are for free 15GB, too delicious. But Google Drive outclasses so many choices to premium packages in many different capacities, from 100 GB to 30 TB for. Plus Google Drive storage service is also very good, very fast speeds and can be used with email, photo storage, data ... OneDrive similar but unique in that you buy pack 1 TB for $ 6.99 / month, will be offered office package office 365 is also very valuable capital.  .

The table compares the supported operating systems: 
 

Conclude

• Dropbox most stingy but most supported platforms, where to go and see with Dropbox. If your storage needs, you can choose Dropbox few reasons can synchronize data easily with multiple devices running on different operating systems. On the other hand there are many applications that support its data backup to Dropbox.
• iCloud service is conjoined with iOS devices, meet storage needs at a moderate level. If you save more then $ 0.99 for pack of 50 GB package is also very interesting because it's cheap, but the ability to support the app on other platforms too little. Only buy if you have demand data synchronization between multiple machines iPhone, iPad and MacBook together.
• So when you choose OneDrive have used the service pack from Microsoft as Office 365 or Windows Phones. OneDrive rich platform support, acceptable price and it is important to 15 GB for free, so we rarely think about the upgrade and pay.
•  Google Drive is featured with good support for both individual users and businesses. 15 GB free is relatively abundant with people. If there is a higher demand, then Google will start with 100 GB package and extending to the 30 TB.