# Comparing and Merging Hyperdrives

Sometimes it's useful to copy files between hyperdrives. This may be particularly useful after [forking a hyperdrive](https://beaker-browser.gitbook.io/docs/advanced/forking-hyperdrives) and making some changes.

To open the "Compare and Merge" interface, navigate to your hyperdrive, click on the Site Info button, go to the "Forks" submenu and click "Diff / Merge Original".

![](https://3230537287-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LvGfMSYfHlK61i8WW-1%2F-M60qYXv36i7HpqhwzJm%2F-M4qj_eIYDd9ICgCsaUm%2Fmenu-diff-merge.png?alt=media\&token=6c65a86a-077c-4c60-8fce-2d1183e5cebf)

This will open the compare interface.

![](https://3230537287-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LvGfMSYfHlK61i8WW-1%2F-M60qYXv36i7HpqhwzJm%2F-M4qjsvwEveXoReRAIsR%2Fdiff-merge-interface.png?alt=media\&token=0e0feede-b569-4f6d-bf03-24f2e85997ac)

Choose the source drive on the top left and the target drive on the right using the dropdowns.

![](https://3230537287-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LvGfMSYfHlK61i8WW-1%2F-M4qcFUmrRudYe0GQEhC%2F-M4qkKZ0s7_XWm_LcNp-%2Fdiff-merge-select-source.png?alt=media\&token=f624713e-0d26-4350-b4d5-72e762ae48a5)

## Merging drives

Select the files you want to merge by clicking on the checkboxes in the left nav, and then click "Merge {n} Changes" to copy the files into the target.

You can review the differences by selecting individual files in the left nav.

![](https://3230537287-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LvGfMSYfHlK61i8WW-1%2F-M4qcFUmrRudYe0GQEhC%2F-M4qke6hFyhnvk9gcHM9%2Fdiff-merge-individual-file.png?alt=media\&token=f68f7251-22a3-482e-ae8e-27f0cc117dd8)

The "Merge" will copy the files into the target drive, overwriting the selected files only.

## Other users' drives

If you don't own the target drive, you'll see a screen like this:

![](https://3230537287-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LvGfMSYfHlK61i8WW-1%2F-M60qYXv36i7HpqhwzJm%2F-M60rxYRgh3_GnsNjQpv%2Fdiff-merge-not-owner.png?alt=media\&token=1efc3b1e-76b2-4fe0-8052-e6c05c8de93b)

Send the URL to the drive owner. It will provide them with the same interface where they can review and merge the changes.


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