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Obtaining the data
1.Why are data available as "Packaged" if they are also in the Data Center? 
Before the Data Center was created, PSID data were distributed as "packaged" files. Because some users prefer the packaged files, we continue to provide data in this format.

2.How long are my data available for download after they are created? 
Data files are deleted from our servers when they are 7 days old. After that, you can re-create your data file by logging into the Data Center and selecting "Previous carts".