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If the following criteria are met, you can delete an empty dataset collectiona collection at the asset level or higher:

• You own the data. That is, you created the dataset collection. 
• The data is not public. That is, the access_group attribute is not empty. For information, refer to Managing Group Access. 
• The dataset 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. Make sure your window is wide enough to display the Uploads option in Click Upload in the header. Click Uploads. 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 data setan asset, select a program from the program list, select a study from the study list, select the data set asset from the data set asset list, and then select Delete DatasetAsset.) A message appears prompting you to confirm the deletion.
4. Click Yes.