Thank you for the replies, the plugin seems to be working quite well now, I haven’t had any customers receive expired links after the update.
Thanks for the reply but I don’t think that is the issue. I am using Dropbox Pro which gives me 200 gig of bandwidth per day and I have never come close to using that up, plus other customers make successful purchases and downloads the same day after other customers receive expired links. When a customer does receive an expired link I just generate another link for them and it always works once I send them the new link so the problem must be something other than usage limits from Dropbox.
Any other thoughts on this? thank you.