Part# RN354 is not for iDRAC vFlash. If you insert SD card on this it will be visible to the operating system. iDRAC will not be able view or manage SD card inserted to above part. For vFlash you need to install SD card on iDRAC Enterprise card. You can find a SD card slot above iDRAC dedicated network port. This is used for vFlash.
Hi and thanks for your attention:Sorry for which maybe is a noob question, but this situation is driving me nuts. I'll very appreciate if someone can point me in the right direction.I'm an instructor in a free school that mainly gives courses to people that can't afford to pay from them. We're currently offering free IT courses and part of the training consists in server configuration, mainly Dells since they're very popular here in Spain.I'm trying to configure the vFlash of a PowerEdge R610 but with no success.As per my (apparently limited) understanding, I must be able to manage the card from the vFlash tab in iDRAC.To summarize the problem: Hope that someone can help me with this. Thanks in advance.  
R610 SD card not detected by vFlash