Enable Document Sets for a site collection
Document sets are used to organise groups of similar or related documents and can be useful for managing projects. This feature is disabled by default and can be enabled at the site collection using the Enable-SPFeature PowerShell command.
Enable-SPFeature DocumentSet –URL http://intranet
Now that the Document Set feature is enabled for the site collection I can enable it on a document library in just a few simple steps:
1. Navigate to the document library and on the Library ribbon click Library Settings
2. Under General Settings click Advanced Settings
3. Change Allow management of content types to Yes and click OK
4. Under Content Types click Add from existing site content types
5. Select Document Set from the list of available content types and click OK
6. Now on the Documents ribbon click New Document and Document Set is listed in the drop-down menu