For VMs using a custom BIOS, the custom BIOS file can be downloaded and backed up using the file download OpenAPI provided by SCP or HCI. When using the file download OpenAPI to back up the custom BIOS file, please note the following:

1. You do not need to specify the snapshot_id parameter when calling the REST API to download the BIOS file because the BIOS file is stored in non-volatile memory.

2. The file name can be obtained from the Content-Disposition header in the HTTP response. This file name will be required during the subsequent recovery process.