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If the following criteria are met, you can delete a collection at the asset level or higher:

• You own the data. That is, you created the collection. 
• The data is not public. For information, refer to Managing Group Access. 
• have permission to delete it in one of the following ways:
  • Via ownership: You created it. 
  • Via group permissions (as described in Managing Edit Permissions) and delete permission. (To request permission to delete data, select About > Contact. For details, refer to Contacting Us.)
  The collection is less than 90 days old.
• The collection is empty. 

To delete an empty a collection:

1. Log in, as described in Logging In. 
2. Click Upload in the header. The upload page appears.
3. Navigate to and select the collection that you want to delete. Click the deletion option. (For example, to delete an asset, select a program from the program list, select a study from the study list, select the asset from the asset list, and then select Delete Asset.) A message appears prompting you to confirm the deletion.
4. Click Yes.