By default, version 7.2 will be installed, but if you prefer an older version, you can add its download URL to your compose file as follows:
By default, version 7.2 will be installed, but if you prefer an older version, you can add the download URL of the `.pat` file to your compose file as follows:
after placing a file called `DSM_VirtualDSM_42218.pat` in your `/storage` folder.
after placing a copy of [DSM_VirtualDSM_42218.pat](https://global.synologydownload.com/download/DSM/release/7.0.1/42218/DSM_VirtualDSM_42218.pat) in the root of your `/storage` folder.
### What are the differences compared to the standard DSM?