As far as laptops vs tablets it depends on what else you are going to do other then just store photos from an ad card I use an WD wi fi hard drive https://www.wdc.com/products/portable-storage/my-passport-wireless-pro.html it has an SD card port and will transfer files from card to drive...
Ok I don't have a Mitsubishi so I not familiar with this part but there has to be a bearing on the pulley if it can be removed it can be replaced. If you can get it out there should be a number on it as most bearings are a standard size a 6003 is a6003 no matter who uses it the only thing that...