|Box||PURR||OneDrive/Office 365||Data Depot||Fortress|
|Price||Free to Purdue affiliated researchers||10 GB free for 3 years; 100 GB for 10 years with grant; Extra project space is $1.08 per GB||Available to students with tuition||100 GB free trial option; Purchase in TB increments, currently $ 75 per TB per year||Free with purchase of Data Depot or Community Clusters|
|Available Storage||1000 GB||1 TB||No upper limit; Total storage capacity: 2.25 PB||No upper limit; Total storage capacity; 10 PB|
|Primary Use||Secure storage for HRPP/IRB approved data, including identifiable personal information such as HIPAA data. Needs to be set up with special settings by ITAP prior to data upload if data is sensitive. Not for export control data.||Project work space; Data publication; Group oriented||Storage; Individually oriented||Storage and services, including data transfer, file structure, and tools ; Group oriented||Data archive for long term storage; Individually oriented; Group sites created upon request|
|Back-ups||Perpetual backups.||Backed up nightly. 30 daily images, 12 weekly images, and 12 monthly images are kept.||Data is stored on the cloud. Details are unclear.||Replicated across campus. Nightly snapshots to protect against accidental deletion.||Data is written to multiple tapes simultaneously. No protection against accidental deletion|
|Access after you leave Purdue||
Faculty and staff retain some access because Purdue owns HIPAA/FERPA controlled access data. Students in regular accounts lose access unless they have moved their data into a personal Box account.
|Still accessible as long as a Project manager is Purdue affiliated person||Lose access||Lose access, but data is retained as long as a Purdue affiliated person is the project manager||Lose access, but data is retained as long as a Purdue affiliated person is the project manager|
|Accessible from HPC systems||No||
Uses Globus to transfer data to HPC systems.
|No||Depot is mounted directly on HPC clusters using GPFS. Data to and from Depot can use Globus for transfer. Personal and lab computers on campus can also transfer files with SCP/SFTP, CIFS, NFS from anywhere.||Uses Globus or HSI/HTAR to transfer data.|