I have a pictures folder on my Western Digital My Book World Edition NAS. Using Windows 7 Home Premium SP1, when I right click on a folder inside, I get the loading icon that lasts a long time (approximately 15 seconds or more).
It seems the larger the folder, the longer it takes. However, just right clicking in the folder, it takes about 5 seconds for the right click menu to come up. Also thumbnails inside take a long time to load.
This happens on my computer as well as another one on our home network. Restarting the router and NAS had no effect.
If I do the same things on my local drive, there is no delay.
What can I try to improve this? Let me know if you require additional information.