I have several My Passport Ultra 2TB and 3TB drives which I use for back-ups of primary data. All are performing well.
I back up my files regularly, but not every day, so I want to store my drives where they are readily accessible but take up as little space as possible.
The ideal space-saving solution would be to store them vertically, that is with the drives side by side in a storage container, but upright on their narrow edge. However, I am conscious that the drives are made up of many carefully-calibrated moving parts and to date, I have generally had them sitting flat - horizontal.
Is there any issue - risk to longer-term performance - from storing the drives upright rather than flat?