Task
This post is a review on 4 of the biggest online storage and collaborations services in the cloud today.
Of course, one can argue that it would be difficult to compare these as they each have their own strengths and apparent weaknesses.
I will be basing my comparison under the context that these will be used for a small non-profit organization trying to minimize its costs, and works in a manner where the management of its activities depend on the energy and dedication of a handful of its volunteers. Activities are managed by some project leaders which are normally tasked by its founders. One can imagine, that work is mostly decentralized and projects are divided into different clusters. A further complication is that volunteers come and go. A team working on a project will have new volunteers coming in, and will also have volunteers going out. There is a lot of reshuffling on the workload, depending on the need of the organization and the availability of the volunteers.
Scenario
First of all given that the organization is working for charity, the price should be affordable. The memory space should be sufficient. It doesn't need to be very big, but it has to be enough for a growing organization. Each department in the organization will have a folder. I will assume that the founding members will have access to all the folders and will have the authority to share these to any team. Once a team leader is chosen, the respective founding member should be able to manage the users and can allow users to gain edit/read only capabilities for all the files in the folder. Furthermore, the founders should be able to make a user, particularly the elected project leader to manage the project team members. This means, the project leader could also add/remove users on a per need basis.
As mentioned, I will focus on the following services out there in the web - SkyDrive, Google Drive, Sugarsync, Box, and DropBox. I know, it would be difficult to only compare personal versions while aiming to recommend a commercial service but I will do my best.
Below is a chart which is still a work in process. I will update this post as I get new information.
Below is a chart which is still a work in process. I will update this post as I get new information.

