N/S/R not turning

Hi all
I've had my tf parked up on the drive for 2yrs covered though with the handbrake off,3 weeks ago I put it in a 20 ft container so the car & i could be out of the elements,by the way a friend of a friend drove it to the container on trade plates anyway it's up on axle stands fired the engine up put in gear and only one rear wheel is turning 😯 never have i heard or seen this before.can anybody give me an idea why & is it beyond a diy to repair
Thanks
John

I think this may be related to the way the diff works and nothing to worry about.

If you turn one wheel by hand the other should turn the opposite way.

Hi
Thanks for that,when I saw only one turning i thought that looks expensive.
Cheers
👍