I tried to donate twice, but there was no one in that little donation center in the parking lot. Hours of operation should be posted so people can know when that is being operational. Is that still something that is ongoing or is that closed?

They usually have a drop off place behind the store.

The shed is unattended please donate at the store.

The parking lot area is simply a drop off point. They pick up donations from that spot early in the morning before the store opens. You may want to donate directly into the store during business hours. I see trucks unloading into the store all the time. I believe there are also associates or volunteers that can assist as well.