Rating: 
Summary: The BEST deal from Amazon yet...
Review: I placed my order on the 10th & got it 4 days later.
That was not what I expected. I wasn't scheduled to get till the 20th - 23rd.
Talk about speedy delivery.
Oh & the card works GREAT! Can't beat a 512MB SanDisk Card for $74.00.
I will sure be using Amazon again!
Rating: 
Summary: Very Fast, Highly Compatible Memory Card
Review: I purchased the SanDisk 512MB Secure Digital Card for use in my MP3 player (Rio Cali-256). I had never before seen a Secure Digital card and was surprised at how small the card is.I opened the package, inserted the card into my MP3 player, and presto. Instant recognition. No need to format the card.
I started downloading my music files onto it, and noticed the speed was equivalent to the memory onboard my player. As a result, I now have an additional 120 mp3 files on my player! I'd give the product five stars, but the memory size did not appear to my MP3 player as 512MB. It was slightly less than this - not too much less, but when I buy 512 MB, I certainly want all 512.
Rating: 
Summary: Dead Out of the Package
Review: I purchased this primarily because of the comparatively low price. I have another Sandisk (128mb) that works well. This one was recognized by Windows the first time I used it but the first files written on it were corrupted and couldn't be erased. I tried to read it on another XP computer but I received an error message "the file is corrupted and unreadable." Sandisk tech support (only 10 sec wait!) agreed it was a bad card. I would buy another brand.
Rating:
Summary: Results of my speed tests using SiSoft Sandra 2004 (SP1)
Review: I ran these tests using SiSoft Sandra 2004 (SP1) just so that I could personally compare the performance differences between my various CF and SD flash memory cards and using USB 2.0 vs. 1.X. Here are the impressive results of the SanDisk 512MB SD Card: Make/Model of Flash Reader used:
Lexar 6-in-1 USB 2.0 Multi-Card Reader (model RW018-01) Homebuilt PC used:
Asus P4P-800VM motherboard with on-board USB 2.0, Intel P4 2.8GHz (800 FSB), 1GB Crucial brand DDR RAM, Win XP Pro (SP-1) 512byte files:
R = 101 kb/sec, 0x
W = 2.2 kb/sec 32kB files:
R = 2788 kb/sec, 15x
W = 107 kb/sec, 0x 256kB files:
R = 5773 kb/sec, 32x
W = 785 kb/sec, 4x 2MB files:
R = 6485 kb/sec, 36x
W = 1638 kb/sec, 9x Note: Why 4 stars instead of 5? Well, I am currently on my second 512MB card. My first one became corrupted after a week of use. It could not read from it write to it or even access it. I use it mainly for my Compaq iPAQ 3970 Pocket PC. Always make sure you backup the SD card's contents to your PC just in case it goes bad like mine did. The Lexar reader I used (which I purchased here on Amazon) makes this a quick process. And try to use USB 2.0, because when I ran the tests above on a USB 1.X system, these were the results I got using 2MB files: R = 1024 kb/sec, 5x
W = 683 kb/sec, 3x Going from USB 1.X to USB 2.0 results in a huge leap in performance. And for you PDA users... The speed of a card is not really an issue since Pocket Mechanic on my Compaq iPAQ 3970 Pocket PC benchmarked my SanDisk 512MB SD Card with a molasses-slow Read Speed of 0.5x and a Write Speed of 0.2x. In other words, the PDA's internal controller is the bottleneck, not the SD card. If writing large amounts of data, I recommend you purchase a USB 2.0 card and USB 2.0 reader for your PC and use that instead.
Rating:
Summary: FAST!
Review: I recently bought the Pentax Optio S4 and wanted to get a memory card for it. I didn't want to ever ever ever worry about saving pictures - I wanted as much memory as possible so I could save as many pictures on the highest quality and never worry. I never again have to utter the phrase "I'm out of film" (memory in this case.) I got this card, stuck it in the camera, and it worked immediately. It is FAST - faster than the internal memory of the camera itself! It can hold approximately 170 photos of the highest quality on the Pentax Optio S4. The speed of this thing is what gets me- saves a photo in like a second or 2 - I don't even get a chance to wait for it to save. CRAZY! Works amazingly well and I could not be more happy with it.
Rating:
Summary: Completely Awesome Product
Review: I was so happy when I received this last night. I couldn't believe UPS delivered so late. Well, about 3 weeks ago I received my Tungsten T2 which is my second PDA (after a long year with the m130). It is completely amazing. I have so many awesome products for it such as: VoiceMemo, Kinoma Video Player, Photo viewer, a keyboard, a Nintendo emulator, a dictionary, a thesaurus, an acronym dictionary, a phrase dictionary, an animator, a remote, palmreader, realone mp3 player, powerone graphing calculator, and many others. I wasn't sure how to play mp3's and when i read about it the palm website made it seem like the only way to use it was to buy the mp3 audio kit they were selling. I thought it had some driver or program which allows mp3's to be played. The mp3 audio kit is basically just a 64mb secure digital memory card (Palm brand) and a palm brand usb/secure digital memory transfer device, with some small headphones. I bought it on amazon for about 57 dollars (it is 99 bucks on the palm website) and i was impressed, but realized I was sort of ripped off. I already had a sandisk memory transfer device, and better headphones, so I payed about a dollar per megabyte, basically. Well, i grew accustom to the palm brand usb/sd transfer device so i wanted to keep it, but I wanted more space. With the kinoma video player and convertor, I can convert many simpsons and futurama episodes i have on my computer (all mpgs) and put them on my tungsten t2 with very nice resolution (all pixels used) and great sound. (the sound is flawless if headphones are used. the palm's speakers are good but not great.) So i had to delete many songs if i wanted to fit a whole episode and it became quite irritating. One night I saw this product here for about 230 dollars and was surprised it was that low. So i searched around and found it at the J and R website (jandr.com) for 160 dollars with a 20 dollar rebate, and out of impulse just bought it that night. It was well worth it. I was going to tell amazon about the lower price but it seems that they already got to it. this card is amazing. A little less than 500 is usable but that's really no problem. i put on all three system of a down albums on it last night and that only took about 3 minutes (about 50 songs). I also put on two simpsons episodes and about 100 nintendo games, along with a few dictionaries, and I still have 100 megabytes left. I know of no one else who uses their palm as much as I do, but I'd like to let people know that it is much more than just an organizer. This card may not be right for you if you don't have any huge programs or files you want to put on, but if so then I strongly recommend it. Just read the directions and make sure you dont abuse it. I'm planning on selling the 64mb sandisk memory card which ive had for about 2 weeks, along with an old, fully functional sandisk usb/sd data transfer device, so if you're interested email regmcube@yahoo.com. thanks!
Rating:
Summary: Amazing New Storage Technology!
Review: It's a wonder it works so well at all, buy tons so it will be affordable!
Rating:
Summary: Great value for what I paid
Review: John gave a great review on this item, and I based my buying decision on his review. Read it if you have not yet done that, I will only add the following: I purchased this SD card along with the Casio Exilim EX-Z4 digital camera. I had the EX-S1 with a the famous and expensive SimpleTech SD card previously, and you know what? you will practically find that both cards are functioning at the same speed and performance levels, only that you have saved US$ 100 difference between SanDisk and other branded cards including SimpleTech ... I would say that it was a good deal, and SanDisk definately sent a strong message to other manufacturers to reconsider their price points.
Rating: 
Summary: Size Matters
Review: Just a FYI, This device is 512,000,000 bytes in size. that is 488MBytes (1024 Method). Then there is 5Mbytes used for the SD Feature of the card, Leaving you 483MBytes. Just wish manufactures would stop playing this game and call it waht is is a 488MByte Card.
Rating:
Summary: Agree with other users, you get what you pay for
Review: Never had problems with San Disk before in my life, then this card came into play. This Card is made in China, and there are imcompatibility issues that people just can't figure out. Other people with the SanDisk SD 512 card made in Taiwan have no problems, just the ones made in China.
It works fine in most devices, but there are some problems with Kodak cameras. Some combinations of cameras and readers work, Pentax and Casio Exslim. But using a Kodak DX6440 will not get a read on any card reader. Works great in the dock, but you can't take it to a photo lab to print without risk of corrupting the card.
San Disk customer support is great, they sent a label to pick up the corrupted card (which worked sometimes when it was new) and sent a replacement card. (that process took 2 weeks) Just don't risk your pictures unless you test out the card throughly before you shoot that irreplaceable picture.
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