Instruction: Generate an answer to the question by utilizing the information contained in the document.

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Question: "i am unclear what physical size/style of sd card to use - not the memory/storage but since sd cards come in different styles/shapes - thanks"
Document: via wireless. Your capacity is only limited by the size SD card or portable USB storage you hook up to it.-Allows you to serve up a wireless access to a wired connection (like, say, the one in your hotel room) that all your wireless devices can use.-Suvives on battery for hours while serving up wireless access to files, your LAN and the internet (via wireless bridge...it obviously doesn't feature mobile broadband built-in).-Works in conjunction with IOGEAR's free mediashair app to allow playback of music and video files on your android/iOS portable devices.-Serves up samba file shares for your truly network-enabled devices.
I love the idea of this product, it's great in theory. I have used up all my space on my iPad so thought this would be the perfect way to keep all my media on memory cards or a USB flash drive to access on all my devices. However the complicated thing is getting the right format so that my iPad can read it. It's all my stuff from iTunes so I don't see why once I transferred it to the memory card now my iPad cannot read it. I literally spent hours reading the entire manual I downloaded online (it tells you how to set it up and download and upload on to the card but no where does it mention what format everything needs to be for your iPad to read it and play back).
I also like how the sd cards go almost all the way inside of it as to make it appear as a more solid item. The overall build quality of it is impressively sturdy my only complaint is the power button seems a bit touchy everything else is solid as can be. its a thicker plastic than most. The battery indicator only changes to red when it is low which isn't the best indicator of when you should charge it however you can use this while it is charging. the iPhone app seems a bit dated and has an ugly ui but there are other apps that will work great with this the first one I tried is more of a file manager but it worked great after plugging in //IOGEAR or the host name in the web app settings and the admin user and password.
After the initial installation process and transferring files, accessing was relatively easy. I would not recommend this as a replacement for your music on your device since you can't play music continually or even by play list. It is very cumbersome to use as music player and definitely NOT if you play music while driving as I usually do. If I just needed add'l storage for photos or files, I could see it being very beneficial.
maybe you could achieve this with a client connected through the mediashair but even that is questionable. I do know that you can secure this quite well with a spa and admin password which is handy. it also has its own dns configurations so you could use that to filter bad sites attempted to be accessed through this device. The sd card slot powers my wifi sd card just fine and it is only 32gb however this also worked with my exfat 64gb png sd card and I have a feeling it will work with high capacities and I'm testing that soon as its not ideal to have a spinning hard drive moving around and changing angles in a backpack.
This lack of file format connectivity is indeed a deal-breaker for me since that is the draw to having an iPad to begin with (a larger screen for video viewing). As of this moment, I am considering returning this device, and contemplating ordering the 5-in-1 RavPower mediastreamer instead.On a positive note this device has excellent connectivity on first connect as well as consistent connectivity (ie. staying connected) while using the device over a significant timeframe with the iPad.Thanks.
I just open the app and go to my device and can choose my movies. I did not expect to be able to do that. Also got a 32gb sdhc card to put my favorite things on and popped it into the mediashair and it comes up on the phone just great. I can put the sd card into my computer and transfer files on the fly, pop them into the mediashair, and have them anywhere, and the thing takes up like NO space. The battery really does stay charged for 9 hours.
I tried using Windows to play video files through its SAMBA service, and it does NOT work either. I am sure this is something IOGEAR will be able fixed if they are dedicated to this product.Please fix it. * Performance is not optimal for network accessUSB Reader performance ~20MB/sSAMBA wired performance ~5MB/sSAMBA wireless performance ~2MB/sEDIT: They finally come up with the fixed firmware 2.000.012 and it has fixed file size issue over SAMBA. I have updated reviews to 4 stars!download here: iogear.custhelp.com/app/answers/detail/a_id/2528/~/gwfrsdu%3A-mediashair-firmware-update
I take a lot of pictures and even more large sized videos so buying more SD Cards is not an option. I can do almost everything from my iPhone or iPad except backing up my SD Cards to SSD/HDD and for that alone had to carry my laptop as dedicated photo bank solutions were flawed and expensive. Keep in mind speed is a real concern. I need to backup 64G easily possibly even more a day and even on my Mac to backup 64G it would require an hour to do so.With the emergence of this device type I saw a chance to finally ditch the laptop (especially since carry-on restrictions are getting crazy , common 5kg limit???)
I read up on the Ravpower Filehub, the Kingston MLW221 Mobilelite they came close and helped me realize what I was needed even more.Ravpower FIlehub has great reviews but I was concerned about the 3MB/s SD Card read speed. This would mean 64G will need 6hrs to backup!! Some have mentioned not being able to read of exFAT formatted SD Cards which is a must for meKingston Mobilelite is not much smaller but battery is. The limit of 3 simultaneous users (vs 5 for Ravpower and 7 for IOGear) would tip me off to a lowend chipset possibly giving me even worse read/write performance but before I even got to that determination I found a reviewer loosing his content and it dropped out of this race immediatelyIn comes the IOGear Mediashair.
Answer: Standard full sized SD.