There is no good reason for upload to be unavailable for members for so long. We want to apologize and assure you that we have a plan to prevent this error from occurring in the future. The uploader is up and running again. Please retry your upload now if you haven't already. For more information, check out our blog post.
This will answer and solve your problem forever. No down-times, no ads, no pop ups and no limits. Extremely professional guys with a professional attitude.
Large companies are using their services because they deliver and deliver it professionally.
I'm partial to GrabCAD for file sharing :)