Pros: -It works with my Galaxy S4. Androids seem to be getting more locked down in regards to being able to transfer files to and from them. When I plug my S4 into my PC it is no longer recognized as a storage device for me to freely exchange files with. That has become a pain as I transfer files regularly between devices. This SanDisk drive has remedied that situation as I can transfer files from my S4 to this drive and then from the drive to my PC or other devices. This is of course more complicated than simply transferring files from my phone to PC, but I'll take what I can get.

-This works with my Nexus 7 2013 so long as an OTG app is installed. I tried Nexus Media Importer and OTG Disk Explorer and both get the job done. Nexus Media Importer seems to be more streamlined for media files while OTG Disk Explorer seems to be a simple file explorer.

-Sliding covers are built into the casing which protect both USB connectors.

Cons: -No USB 3.0 functionality. In addition to this drive, I also own a Corsair Voyager GO which features USB 3.0 (costs about $6 more at the time of writing).

-Transfer rates aren't great, generally around 12MB/s, occasionally I noticed up to 19MB/s. (Voyager GO via USB 3.0 manages 140MB/s read rates)

-Too bulky to plug into my Galaxy S4 without removing the phone's protective cover. The Corsair Voyager GO is much more slender and does not have this problem. Granted, the Voyager's USB 3.0 connector is exposed without the cover that this SanDisk drive features. Personally, I would sacrifice the protective sliding covers to make this more slender.

Other Thoughts: The drive (and others I've used like it) is formatted using the dated FAT32 file system. FAT32 limits file size to 4GB which limits my ability to store certain hi-def movies on the device. It can be reformatted using whatever file system you like, but many phones/tablets will have compatibility issues with other file systems. My Galaxy S4 supports exFAT but not NTFS. My Nexus 7 supports NTFS but not exFAT. This is NOT a limitation of this SanDisk drive, but an inability of phone/tablet manufacturers to properly support modern file systems. This is one factor limiting the marketability of OTG devices such as this.

Overall, I was pleased with this device. If it could plug into my S4 without my having to remove my phones case it would get 5 out of 5.

Pros: -In my original review I reported somewhat lackluster transfer rates. After noticing other reviews showing higher numbers I decided to double check my work. It turns out that the USB 3 ports on my monitor don't seem to transfer at USB3 speeds. I plugged the drive directly into a USB3 port on the back of my motherboard and that seems to have changed everything. Transfers TO the drive are a consistent 22MB/s. Transfers FROM the drive are a very respectable 140MB/s. MUCH better than before.

If you aren't seeing speeds like these then double check which port you're using and insure it is actually functioning @ USB3. I also have a USB 3 cable which functions as USB 3 but doesn't seem to be able to transfer files quite as quickly as plugging the drive directly into the port, so keep that in mind as well.

Cons: I still have issue with the lack of file system support amongst mobile devices but that is no fault of Corsair.

Other Thoughts: It's been a little over a month since I posted my initial review and this device has become a staple in my tech repertoire. I regularly backup mobile data. I have no doubt that this will save me from losing pictures to a flaky sdcard or lost/stolen phone some day. It also seems to be a quicker and more convenient way for me to share files with friends and coworkers who have compatible devices. If you have any need whatsoever for a flash memory card, there's really no reason to NOT get one from this series.