There are many cloud based file sharing services and each offer various plans with different download and upload speeds. If you are confused on which one to select, you can try out Online Drive Benchmark tool, which compares and benchmarks various online storage drives. There are big differences in the quality and performance of the available online drives and Online Drive Benchmark allows you to measure this by uploading and downloading files from their servers.
Currently the service supports Strato HiDrive (only if it is available in your country), Trend Micro SafeSync, box.net, DriveHQ and Filesanywhere. You first select which drives you would like to test. Then you set up a test account for each drive and connect it to your PC.
Online Drive Benchmark will then run several tests for each drive to find out how well it performs. Then it calculates a single score all those tests. A higher score means the drive performs better. Although at this stage many of the storage services are missing, but the tool is in its early stages, so expect more services to be added in future.