I've been looking everywhere for a clear answer but i just cant find it for some reason. Im building a new desktop so Im planning to migrate the os from my super old hdd to a new ssd. I only need the os from it and 6gb of some other files, which im prob gonna store on google drive. The thing im completely confused with is that, after i migrate my os to my new ssd, does all the data in the old hdd get erased, or is only the os thats getting erased? can i continue to use that disk, or do i have to format it after the migration?