Snapshots of instance store volumes may be automatically obtained prior to an upcoming migration event for an associated VM instance(s). This automated snapshotting allows customers to restore their data from the snapshot of their instance store volumes in the event of a failure during the migration event that results in an inability to start (or launch) the customer's VM instance on a target host computer. In an example process, a computing device(s) may determine that a migration event is scheduled to be performed for a VM instance, determine that the VM instance is associated with one or more instance store volumes, obtain a snapshot of the one or more instance store volumes, and store the snapshot in storage of a network-based storage service prior to performing the migration event. In some embodiments, the snapshot may be stored in association with a service provider account of the network-based storage service.