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If the following criteria are met, you can delete an empty collectiona 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. 
• The collection is less than 90 days old.
• 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 empty. 

To delete a collectionTo delete a file:

1. Log in, as described in Logging In. 
2. Click Uploads 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 a datasetan asset, select a program from the program list, select a study from the study list, select the dataset asset from the dataset asset list, and then select Delete DatasetAsset.) A message appears prompting you to confirm the deletion.
4. Click Yes.