Network Hard drive will only work after reset for about 10 minutes

I have a network MyBookworld (white light) which has worked fine for years. Now, suddenly my PC will no longer find it as a network drive and the discovery tool can’t find it either. I have read through some stuff on the internet which suggested that the reset button should be pressed - I have done this and the drive was found again. However, after about 10 minutes, the connection is lost again, and can only be re-established by resetting it again. There is no issue with powering etc but I can’t fathom how the link keeps getting lost?

I don’t feel inclined to buy a replacement as when it does re-connect after a reset, all the data is still there

Thanks in advanvance


I should add that the firmware is up to date.