I bought the Ravpower RP-WD01 Wifi Disk after reading some positive reviews on Amazon, and I feel this is one of the best investments I've made for my phone and tablet and for my traveling pleasure. I've looked into getting Seagate's wifi external hdd but that's just another device to spend a lot of money on when I already have so many SD cards and usb flash drives. I even have a perfectly good portable Seagate hard drive that I don't want to replace. With this device, I can finally use all these different storage types without the hassle of dealing with cables or other compatibility issues. Where I got this: Amazon What's in the box and Specs: 1 RAVPower WifiDisk 1 USB to micro usb cable User Guide (hard to understand, Amazon reviews helped me greatly though) 1 SD card slot 1 Standard usb port 1 micro usb port From the manufacture: - Model: RP-WD01 - Wi-Fi Standard: 802.11b/g/n - Wi-Fi Frequency: 2.4 GHZ - SD card support: up to 128 G - USB HDD support: up to 2 TB - USB type: USB 2.0 - Micro-USB type: USB 2.0 - Power Bank Capacity: 3000 mAh - Max Input: 5V / 1.5A - Output: 5V / 1A - Dimension: 4.65" x 3.11" x 0.55" - Weight: 4.23 oz. - Working Temperature: 5-35°C - Storage Temperature: 0-60°C - Certification: CE/FCC Wifi Disk unit which doubles as a 3000mah external charger with your own charging cable. App used: AirStor Also comes with its own user interface through the web browser if you rather not download an app. Some basic Instructions and access: Getting onto the network: This device is essentially my own portable network where it comes with its own SSID and you will be able to find it in your nearby wireless networks. SSID for mine is WiFiSD-1164 (might be different for yours). Turn on the Wifi Disk and looked for the SSID in my wifi network. Enter in the default password which is 11111111. Now I'm in, and can access my portable storage. Using the app "Airstor": After downloading the app, and getting onto your WifiDisk's network, I can go directly to Airstor and it will pull up all data that's attached to my WifiDisk. Using the Web interface: After getting onto my WifiDisk's network, I go into my browser (should work for all computers, smartphones, tablets, any device that has a web browser) and typed in 10.10.10.254 and a green and black interface popped up prompting me for my login information. First time login information is "admin" all lower case and then nothing for the password. You can change this later in the settings. I personally have not tried, but after reading some reviews of this product, it seems you can also use other file explorer apps to access your content within the WifiDisk. If anyone out there knows of any other file explorer apps, please share. Performance and Likes: I was able to test this out with my SD cards of varying sizes from 2gb to 64gb (I have 5 floating around). It also works with micro sd cards with an adapter. It has work with all my flash drives and my Seagate portable hdd. 5 devices can be connected to this at once. I have not tried out 5 yet but I've tried 3 and I think having the ability to have more devices at once makes this product even more worth on having because everyone in the family or your friends can access your videos and files during trips. And what's even better is that one person can be watching, for example, The Big Bang Theory, and another can be watching How I met Your Mother at the same time. I was able to play a variety of video files such as avi, mp4, divx/xvid, mkv, mov and possibly even more. Everything played smoothly on a single device and on all 3 (galaxy s3, ipad, iphone 4s) I tested the range on this thing and I believe I can go about maybe 30 feet before the signal is lost (from my front door to the bedroom). The 30 ft range has been enough for road trips and viewing files from around my apartment with little to no interference. It connects wonderfully to my home internet. I was able to configure it through the browser interface, however there are options through the app as well. After setup, I was able to access both my files and my home internet at the same time. This is like a wireless bridge to your router so when configuring your internet, you will need to enter your password for your router. The app Airstor is a very clean app and very straight forward. The only issue I had was that I could not figure out how to move a list of photos from the WifiDisk into my Photo's camera roll. Apparently you can only save one at a time. There maybe a backdoor way to doing this, however I'm not that savvy enough to figure this out. If anyone buys this and figures it out, can you let me know? It does tend to feel a little glitchy at times with the graphics, however it's very minimal. The web interface works pretty much the same way as Airstor. Also since this devices comes with its own web interface, you can even access your media as well as adding media from a standard computer too. I can literally drop a file into the WifiDisk and after it finishes uploading, I can already access it from my iPad or phone without needing to plug cables into any other device. Love that this is wireless! This can be tucked away in my bag or anywhere within range and I can watch my videos or listen to my music on my ipad or phone. Truly amazing device at a fraction of the cost of name brands wifi hdds. Dislikes: I really dislike how I need to hold the power button for it to turn on, but perhaps they made it like this so you can't accidentally turn it on and waste battery. The load up time for the network to display takes a while. It surely isn't instant though. Lastly, I personally do not like the color combo of this unit however since this works so well for me, I can overlook it. I think if this came in other color choices or perhaps all black, it would make for a very sleek looking device. Overall: This is such a great device and Ravpower gives such personal customer service too. They have personally called me to ask how my product is doing and that alone really tells me that they truly care about their customer's input and satisfaction. I'm really liking this brand. I also own their xRobot 30 pin portable charger and their 10,000 mah portable charger. I hope to see more variety in their products soon. Perhaps cases and other accessories. I hope you found this review useful and thanks for reading. Sorry if it was super long... I'm not affiliated with Ravpower whatsoever. Everything was bought with my own money. Pictures: Here are some photos for comparison on size. Pictured with this is a Seagate external hdd and iphone 4s.