Sometimes you may wish to manually replace one or more of an object's Datastreams. This is useful when, for example, you want to change the collection policy for a particular object.
1. Locate the Object
Navigate to the object in the repository. For this tutorial, we'll look at the Basic Images collection object.
![](/download/attachments/31659987/Chapter3image6.png?version=1&modificationDate=1320792545910&api=v2)
2. View the List of Datastreams
Click the 'Object Details' tab and expand the 'Detailed List of Content' section at the bottom of the page. Here you will see a list of all the Datastreams associated with the object.
![](/download/attachments/31659987/Chapter3image16.png?version=1&modificationDate=1320792545788&api=v2)
3. Download the Relevant Datastream (Optional)
In some cases you will already have a copy of the Datastream you wish to replace. If not, simply click the 'Download' button beside the relevant Datastream in the list and make any necessary changes to the file.
![](/download/attachments/31659987/Chapter3image17.png?version=1&modificationDate=1320792545776&api=v2)
4. Replace the Datastream
Click the 'Replace Datastream' icon to the right of the relevant Datastream. You will be taken to a new screen where you can browse your computer for the correct file and upload it to replace the current Datastream.
![](/download/attachments/31659987/Chapter3image18.png?version=1&modificationDate=1320792545764&api=v2)
You have successfully replaced a Datastream.