Amazon Cloud Drive is provided by online shopping giant Amazon and is accessible off the left side bar when you are logged into your Amazon account.  The service offers two types of free cloud storage:  

  • 5 GB of cloud storage for general files
  • unlimited storage of Songs purchased from Amazon MP3. These never count toward your Amazon Cloud Drive storage limit.

Beyond the free storage allotment, Amazon's Cloud Drive pricing is currently:  

20 GB
$20.00 / year  
50 GB
$50.00 / year  
100 GB
$100.00 / year  
200 GB
$200.00 / year  
500 GB
$500.00 / year  
1000 GB
$1,000.00 / year  

Billing is on an annual basis.  If you need to upgrade the system prorates your payment and immediately increases your storage limit. If you downgrade your plan, the downgrade takes effect on the next anniversary date.

Files are accessible in folders that can be accessed from up to 8 of your devices - not from anywhere like competing products.  This is actually a serious limitation defeating many of the benefits of Cloud Storage. because the site FAQs say: 

 

Amazon Cloud Drive allows access from up to eight devices. This includes mobile devices, different computers, and different browsers on the same computer. This device limit can be reached if your Web browser cookies are deleted or if your browser is set to automatically delete cookies.

If you try to access your music files using Amazon Cloud Drive from more than eight devices, you'll see a message "Cloud Drive Device Limit Reached." You can still access your Cloud Drive files and music using Amazon Cloud Player through the eight devices you've previously used.

 

Another limitation is that, while the free storage is available to everyone, the paid upgrades are not available in many (mostly European) countries. 

Also, Amazon Cloud Drive and Amazon Cloud Player are only for individual use and therefore not for business.  That space is where Amazon S3 competes. 

If you have an Amazon account, you have an Amazon Cloud Drive account whether you use it or not.   Check for more details here

 

Dropbox is another cloud storage solution that offers free accounts.  Users start out with 2 GB of free space and the site promises that they will always offer free space.

With 45 million users and growing quickly, Dropbox is redefining the cloud storage space.  One of the main reasons that Dropbox is growing so quickly its that they reward users with free space for inviting new users - 1/4 GB up to a maximum of 8 GB of free space (so 10 GB total free space).

Beyond the free space, additional space is currently priced at:

50 GB for $ 99 a year

100 GB for $199 a year

1 TB+ For Teams - pricing varies.

Always a storage solution designed around easy sharing of files between different people, Dropbox introduced Dropbox for Teams in Oct 2011.  Businesses can now experience the same ease-of-use along with new administrative controls, centralized billing, phone support, and plenty of space for everyone on the team. 

You can join Dropbox free and help the author out with extra free space while you get free space as a bonus too.

ADrive is another cloud storage service that starts individual users off with 50 GB of free storage (for personal use only) and offers premium services of 100GB, 250GB, 500GB, 750GB,
1TB to 10TB on subscriptions.  These services start at $39.50 a month/$139.50 a year. The free service is supported by on site ads, while the premium services are ad free.  

Sharing files is easy on ADrive.  Either generate a link from within the interface to share or just email the file to your contact. There is also a support forum and the company supports paid users via email.

Symform - Cloud Storage - Online Backup

Symform uses a very different approach to offer free cloud storage.   Signing up give you 10 GB of free cloud storage but users can earn up to 200 GB of free space by referring others and  contributing local hard drive space to the Symform network on a 1.5 to 1 basis (which helps provide redundancy in the system).  Kind of a co-op plan for cloud storage where all participants are contributing space on their servers to get space on other people's servers. This facilitates off site backups for everyone involved

It works like this:

How To Get 200GB of Free Cloud Storage

Going from 10GB to 200GB of free cloud storage is as easy as Register, Set Up and Refer! 

  Free Cloud Storage What you Need to Do Helpful Tips
REGISTER 10GB Register and join the Symform Cloud Storage Network You need to have a valid email address confirmed and successfully set up your account and device!
SET UP 100GB Pledge to contribute 150GB to the Symform Network The usage to contribution ratio is 1.5x, so to receive 100GB free you need to pledge 150GB contribution.
120GB Your contribution device successfully accepts a data fragment within 24 hours of Symform installation and set-up. As your free storage increases, your contribution needs to increase respectively. So, to move to 120GB of free storage, your contribution needs to increase to 180GB
REFER Up to 200GB Refer Symform to friends and colleagues. They get free storage and you get 10GB additional free storage for every referral that registers a new account. Remember to increase your contribution as you increase your usage!

SugarSync logo

SugarSync offers a basic 5 GB of storage totally free with no credit card required.  Paid personal and business plans are available.  

30 GB for $4.99 a month/$49.99 a year

60 GB for $9,99 a month/$99.99 a year

100 GB for $14.99 a month/$149.99 a year

250 GB for $24.99 a month/$249.99 a year

The site offers a 30 day free trial to get to know the service.

Google Docs 

Google docs is a free service linked to Google (mainly Gmail) accounts.  It facilitates storage and sharing on documents on the cloud.  The system is designed for online collaboration in either a closed or public format. 

Price:  Free for now.