The rumors about Google Drive have been coming fast and furious lately, and now we've got one more piece to add to the puzzle — as well as a possible launch date. Reuters is reporting that Google's cloud-storage service will indeed launch with 5GB of free storage as was reported last week, but adds that users will be able to add additional tiers of capacity for a monthly charge, all the way up to a maximum of 100GB. According to Reuters' "source familiar with the matter," a launch is imminent, with an announcement to be made as soon as Tuesday. As expected, the service is said to allow users to store documents, images, and other files, and will implement a "sophisticated image search technology" for quick access through the stored files. With alleged apps and Google Drive sharing options having been spotted in recent days, there's little doubt that the service is coming. Whether Reuters' timeline proves to be correct, however, still remains to be seen.