The resources already uploaded to tDAR are free for you to use and download. We only charge a fee for users that want to upload their own resources into the repository. Our prices are based upon the number of files uploaded. File price is based on a sliding scale—the more files purchased the lower the cost per file. Allotted space is “pooled” meaning that if you buy more than one file, the associated space in MB can be distributed between those files in any way you choose. We accept debit and major credit cards including MasterCard, Visa, and American Express.