Capacity
APTrust accepts all types of digital content from its member institutions, including but not limited to print, audio, video, and encrypted files. The Amazon Web Services (AWS) platform provides APTrust with unlimited capacity that usually generates costs only as it is needed or used. A portion of the APTrust annual membership dues covers preservation of the first 10 terabytes of content per member, and members may purchase additional capacity based on current costs. Those core service costs provide for three preservation copies of content in separate S3 availability zones in the AWS data center in Virginia and three preservation copies of content in separate Glacier availability zones in AWS’s Oregon data center. APTrust conducts its own fixity checks on deposited content every three months.
The APTrust service also has a standard-Glacier-only service with three copies of content in separate availability zones in the AWS data center of the depositor’s choice. The cost of this service, which represents a lower-assurance preservation component for institutional preservation programs, is $60 per terabyte per year. APTrust also has a Glacier Deep Archive service at a cost of $20 per TB per year, and the consortium is currently developing a Wasabi-based service to add in the 2020-21 academic year.