I seem to have a file system problem when using a Sandisk 64GB SDXC card in my recently purchased ASUS MeMO Pad 8 (ME180A) and wondered whether anyone else has experienced a similar problem. Asus claim that the ME180A supports 64GB SDXC so I thought I should be OK. All worked fine until I loaded the card with around 15GB of data (photos, music and home videos). This is made up of around 2000 files spread between around 250 directories/sub-directories. Most of the time all works fine but at the first startup all access to the external SD caused the file manager to hang (I have tried ASUS File Manager, ES File Explorer and File Expert). It takes one or more restarts to clear the problem. The problem then recurs intermittently during the day. At 12GB with around 60% of the number of files and directories, everything works fine. The only cause I can think of is a conflict between the file manager and the download or notifications processes ( - possibly causing a corruption to the file allocation table?). I don't know enough to speculate further and am waiting on a response from Asus Support. I have access to a second ME180A with identical configuration and get the same results from this. As a key use of the tablet was to store music, photos and videos, this is a major issue for me. Anyone have any suggestions.