Problems upgrading to OS5

Trying to upgrade MyCloud from OS3 to OS5.
My current Firmware version is v04.05.00-353. The instructions say first upgrade to “firmware version 2.41.116” or laterby downloading it. The site only contains a slightly later version and the download is a .bin file which Windows 10 or the MyCloud dashboard can’t do anything with.
I was hoping that I could see the “update to OS5 box” in the dashboard, but it isn’t there.
Any ideas? Would be so grateful as I’ve been going around in circles for days.
Thanks

@6_iron
Several things are wrong here. First, you don’t own a, My Cloud Home. Second, you own a 1st generation WDMYCLOUD OS3 Firmware 04.05.00-353 and it will not update to OS5! Last, you have posted in the wrong sub-forum.
My Cloud OS3 End of Service | Western Digital