Database Users

SD Card Issues...

I've just bought a 2gb 120x Moby Memory SD for my MDA Compact...and the it does not recognise it.Upon insertion it says it wants to format the card and says it formatted successfully. However I can not find the card in 'file explorer' or 'memory'. When I look in 'About/Version' it says the expansion slot is in use.
After speaking with Tech Support at Moby (Excellent) - We swapped it out for a 1Gb 80x SD card (their own)...and the same problem.
T-Mobile support is ...chocolate teapot comes to mind!
Out of the box rom: 1.01.00 WWE (21/10/04)
Has anyone got any ideas about this one (greatly appreciated)
Regards
Paul

I don't know that I can comment on your specific problem, as I have a cheap 1GB SD card that works without issues. Your ROM seems to be really old, however, and you would benefit tremendously by upgrading to the 1.11 or 1.12 versions (1.11 is extremely stable and seems to be a crowd favorite). I don't know if it will resolve your SD issues, but it should at least improve other aspects of the phone. (stability, call quality, bluetooth functionality, and camera quality)

Little Survey...
Okay...i've upgraded my rom to the imate Jam 1.12 from club imate site on my MDA Compact to see if the SD card problem goes away....NO it doesn't. This is really frustrating...and the JAM rom is not as good as the tmobile one with periodic slow downs and already one reset.
Anyway folks, I want to see if I can get some correllation with rom and SD cards. So a mini survey for you all. If you have a T-mobile (originally) MDA compact and use an SD card let me know:
Current ROM Make?
Current ROM Version?
SD Card Make/Model/Capacity?
Any problems with other SD cards?
I will publish a summary for everyone later.
P

sd card
i don't have a tmobile compact,
rather a qtec s100, although I got a TMobile manual in my box..
anyway, i have a 2gb 150x speed ADATA SD Card and I have exactly the same problem. If you browse this forum you will see there is one or two more other topics about the exact same issue.. dont think its anything to do with a specific vendor pda i.e. o2 / tmobile.... but rather a jam thing.
I don't think they currently recognise the latest sd cards, although, i've been told they do recognise the 2gb ultra disk from moby memory retailing at about £133.
So, we can either wait for the ROM upgrade to include the latest stuff, or swap or sell the cards and buy another one.. i'm probably doing the latter to be honest as i just cant wait.
ANyway, if you do find the problem, please let me know.
Regards,
Bushmen

Current ROM; Original T-Mobile
Other details in sig.
Have SanDisk SD 512mb, 100% fine from day one till now.

They don't seem to recognise the 2gb Moby SD...because that was my initial purchase. Then I downgraded to the 1gb. They are going to send me another 1gb from a different manufacturer. Moby are having a few of these problems cropping up.
P

2 Gb GB SD doesnt works but 2GB MMC works fine... :?

MDA & SD CARD
Original MDA ROM & Radio V1.12
Bytestor 2 x 1gb hi-speed cards, no problems 100% perfect.
256mb Kingston card, today, no problems so far.

transend 1gb high speed no prob
old twin mos 256 mb card had same problem with you. but after i fomatted it with an external card reader and windows, worked perfectly. (this was used for a digital camera before)
hope this helps

PJS said:
I've just bought a 2gb 120x Moby Memory SD for my MDA Compact...and the it does not recognise it.Upon insertion it says it wants to format the card and says it formatted successfully. However I can not find the card in 'file explorer' or 'memory'. When I look in 'About/Version' it says the expansion slot is in use.
After speaking with Tech Support at Moby (Excellent) - We swapped it out for a 1Gb 80x SD card (their own)...and the same problem.
Click to expand...
Click to collapse
Do the cards work fine in a PC card reader?
Does "formatting" on the MDA cause the card to be unreadable on the PC (until you reformat it on the PC)?
If so, these are the exact symptoms found on some early Magicians. If the card works in a PC, then it's a fault on the Jam/MDA, not the card, although the fault does vary by card brand. If you don't get the MDA swapped out, you could end up with it randomly wiping your card. See http://www.expansys.com/forumthread.asp?code=I-MATE_JAM&thread=153
If you don't have a PC card reader to test - get one (make sure it's USB2). Life is not long enough to transfer 2GB by activesync!

Imate Jam
My cards:
Apacer 1gb-no problems
Sandisk Ultra 2gb-no problems
Sandisk 1gb (regular)-no problems
For the moment it looks like if you want a 2gb card that works in your Jam, you'd better get the Sandisk Ultra 2gb.

Matterhorn said:
Sandisk Ultra 2gb-no problems
For the moment it looks like if you want a 2gb card that works in your Jam, you'd better get the Sandisk Ultra 2gb.
Click to expand...
Click to collapse
I can confirm, it works on my HTC Magician too, formated with Fat32 on my PC and pluged into the Magician and have full capacity available! Already filled up with 1.4GB of data (TomTom Maps mostly) Really seems the only 2GB SD card working on the Magician :roll:

See my posting here:
http://forum.xda-developers.com/viewtopic.php?t=24988&highlight=2gb+sd

1GB Magu SD Card 120x Hi-speed, dint work on MDA Compact.
1GB Magu SD Card 120x Hi-speed, dint work on MDA Compact.
Works fine on PC Card reader. But shows prompt for "Format" on MDA. When formatted, it does not show in File Explorer, but About Box says explansion slot in use. This card works fine on my Orange SPV (1st model).
I am trying for 512MB 60x speed Toshiba card.

Transcend 4Gig works on Jam - WITH SHIM
The JAM is famous for having innaccurate "travel" in its SD contact mechanical design. SD cards that are not thick enough will give this symptom. The fix is to add a "shim" of plastic or paper to the contact side of the SD card.
I use the sticky part of a PostIt note. Cover the entire card area except the contacts at the bottom. Contact side only. The Transcend 4 gig card is too thin, but adding the trusty PostIt fix now allows me to use this huge ($100) card with no problems. Hope this hack fixes your SD issues too - chuse...

Storage Card

I have just purchased a Sanddisk ultra ll 1.0gb storage card.
It works fine in my digital camera but when inserted into my spv m600 the device wont recognise it.
Is there a storage card limitation with the prophet and if so is there a way round it ?

I have similar problem with SD card Transcend 2 Gb x150. When I got 2 Gb TwinMOS x66 problem disappeared. I think the problem is the too high speed of card. Probably they can’t work at speed which is sufficient for Prophet.

Card problem?
Anybody else had sucess with the Transcend 2gb card x150? I was thinking of purchasing the 4gb version, at same speed, but now I'm not sure I want to waste my money.
Anybody else have a 4gig, can you name brand and speed pls?

I have used both the sandisk 1gb ultra II card and the sandisk 2 gb. Both work fine in my I-mate jamin. The ultra II is much faster, but i mostly use the 2gb card, cause I need more space. If they had a 2gb or 4 gb ultra II i would buy it also...I have also used the PNY 2 gb cards. They all work in my jasjar as well. But like i said, the ultra II works best.
You might need to re-format the card and then try it (not with the camera format option, but from the Jamin)
You can download a beta copy of pocket mechanic (good for 15 days without license) at www.antontomov.com go to forum and check pocket mechanic beta forum for latest version

Thanks eagle1
That's good news Eagle. What are the speeds of your two SD cards?
Anybody use a 4 gig non-sandisk card?

I'm using a Trandcend 150xSD 4 GB and it works great.

i am using an sandisk extreme III (150x) 1 GB and works great

Still no card showing
Thanks people for your posts and advice i have tried a few things including pocket mechanic but still have not managed to get my prophet to accept the Sandisk Ultra ll 1.0gb sd card.
If anyone comes up with a soloution or indeed has a SPV M600 with a working Sandisk Ultra ll 1.0gb please let me know.
Just off to e-mail Sandisk to see if they can help.
Thanks again for your posts.

It seems that high speed SD cards workability balanced on the edge with Prophet PDA’s. So best approach would be Try – Before – Buy. “Minor” problem would be to find store where this approach works for SD cards .

Has anyone tried A-Data 4gb 150x?
Has anyone tried A-Data 4gb 150x? I think this is the cheapest 4GB card out there, so I'm wondering if anyone has tried it on the prophet?

I have just started using a 4GB 'Topram 150x'. Seems to work OK, except can't directly save photos to the SD card. According to other posts, something to do with having more than 2GB of empty memory. However, can transfer photos from main memory to the SD card without any problems. Music and videos appear to store and play back without any problems

SD CARD NOW UP FOR SALE
Still no joy with my new sd card so decided to put it on ebay
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7612649443&ssPageName=ADME:L:LCA:UK:11
Had a word with the staff in the local pc world to let me try before i buy but no go, they said they would not give me my money back either unless the card was faulty. Not that i would buy one from there with the price they charge.
Will keep you all posted on what card i get to work with my SPV M600.

I'm confused
I'm really confused. How can it be that a particular Sandisk 150x speed works, and another one doesn't? Or one 4gb high-speed works, the other doesn't? I can't seem to find a pattern here. Its just random.

Re: I'm confused
krale said:
... I can't seem to find a pattern here. Its just random.
Click to expand...
Click to collapse
My guess is the low speed threshold for high speed SD card actually randomly higher than the normal operation for Prophet hardware. In this case two high speed SD cards which are same type of same manufacture may have randomly different low speed threshold, what is out of concerns of manufacturer. Who would cares about low speed access ability? And now we have to go through risk of buying perfectly good SD card which may not work on our Prophet devices. I hate this.

Hi,
I'm using an Extrememory 2 GB and 4 GB SD-Card. No problems with my Jam aka Magician or XDA Neo aka Prophet.
andilein

pbeaco said:
can't directly save photos to the SD card. According to other posts, something to do with having more than 2GB of empty memory. However, can transfer photos from main memory to the SD card without any problems. Music and videos appear to store and play back without any problems
Click to expand...
Click to collapse
I think the new ROMs have fixed that.

adeywatkins said:
I have just purchased a Sanddisk ultra ll 1.0gb storage card.
It works fine in my digital camera but when inserted into my spv m600 the device wont recognise it.
Is there a storage card limitation with the prophet and if so is there a way round it ?
Click to expand...
Click to collapse
Ade,
You sure say no be old ROM you dey use?

Hi again here is my SPV M600 AKA Prophet Device info
ROM VERSION 2.10.1.22 WWE
ROM DATE 2/16/06
RADIO 02.07.20
PROTCOL 413.1.03
EXT 2.10.1.107
OPERATOR VERSION 13.10.1.107

Storage CardJ
Just found this on ebay http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7611242138 works out just under £60 for adata 4gb 200x MMC card which apparently has better compatibility.

I upgraded the ROM and I can now save my photos directly to the SD card as long as the picture resolution is 640 x 480 or less. For the higher resoltion photos I have to save to main memory. Can anyone make any sense of this?
Otherwise I am having no problems with the SD card. I am not about to go and buy another one, so I will just use my workaround of saving no main memory and copying to rthe SD card when memory is low.

4GB SD memory for XDA Exec (Universal)

Hello
do you guys know if a 4 GB SD Card will work with the Universal. I saw in one of the signatures that people are using 2GB SD Cards, was wondering what is the upper limit?

I have an AData 4GB card purchased from some dodgy geezer in Hong Kong via eBay - it works perfectly. So go ahead and get yourself one

I've got transcend 4GB SD 150x works good

I've got a MyFlash 4GB card,
works perfectly

sl9 said:
I have an AData 4GB card purchased from some dodgy geezer in Hong Kong via eBay - it works perfectly. So go ahead and get yourself one
Click to expand...
Click to collapse
Me too

noname 'My Flash' 4GB 200x turbo MMCplus works too.

phsnake said:
I've got transcend 4GB SD 150x works good
Click to expand...
Click to collapse
same here.

not good
I will works fine but after you rich the maximum data with combination of software, you can encounter slow moving of any application hanging more often than usual and it will eat your battery 4x faster than normal consumption. :?

The speed of the card doesnt make much of a difference when using the it in the PPC. But you will notice the 150x SD card in a card reader for on the computer. Speeds of read and and write will be really fast, but it has no effect on PPC speeds, the PPC can only go so fast.

iv got a 150x transcend in mine working fine, well iv used it for about 4 months now, it does however have some slight issues with the camera...
before you can save images direct to the card you must have less than 2GB of space left on the card as the camera prog does not recognise anything more than 2gig, so if you try an take a pic with an empty 4gig card it will fail (unless you set images to save direct onto phone)
1 other problem i have encountered, i dont know whethere this was down to the camera, the phone or the card but, when i was away on holiday, i had around 2.5gb of audio and was using the camera a fair bit on my travells, then 1 day when i took a pic it overwrote (is that a word?) :lol: everything on my card!!! when i went into my storage space it said that the card still had 3gb taken up on card but when i went onto file explorer there would be nothing left showing on the card other than images i had taken since :roll: bit of a pain in the ass but it hasnt done me any wrong since then, still filling it with lots of audio/txt/images and no more problems (touch wood)

i had this experience with a 1GB sandisk card. I think it happens when a read or write to the SD card fails or doesn't finish [not sure here], happened twice the 1st instance I was able to use the SD card again [reformatted it with a camera, then again using Resco Explorer on the PPC] the 2nd time it happened the card was dead. Right now I am using a 1GB miniSD [in the adapter of course] which I bought for my ex-PPC [a Wizard] I plan to get a 4Gb SD card as well. If the speed of the card is only really noticeable with card readers then I'm ok with that [as I transfer songs and such via my notebook's in built card reader]. Hmm time to go SD card hunting over the weekend!!! Wonder what I'll do with the miniSD though... I have a 1Gb card in my digicam as well, maybe I can pass that off to my lil sis or something... :roll:

Ive just bought "Platinum" 4GB. It cost me 82$, here in Poland.
Universal report it have just 3,56GB but it is working as expected. Ive benchhmarked it in pocket mechanic - index:122
best reg,
Piotr

I got a Transcend 4Gb 150x SD Card [Part No.: TS4GSD150]. For around 88USD. It is reported as 3.86Gb under Resco Explorer.

I bought a MobyMemory 4Gb card from, suprise suprise, www.mobymemory.co.uk. Almost certainly rebadged from somewhere else but I though it was a good price at under £50 and works fine on my XDA Exec. They also throw in a free SD reader as some readers have trouble with 4Gb SD cards. I had to reformat the SD card under Windows XP for it to be seen by both the Exec and Win XP (as shipped, only the Exec could read the card).
Have the wiki and tomeraider on there - great for being a smartarse down the pub.

sl9 said:
I have an AData 4GB card purchased from some dodgy geezer in Hong Kong via eBay - it works perfectly. So go ahead and get yourself one
Click to expand...
Click to collapse
I've just ordered one for a total of 37 quid

Hi guys,I am new here .
I am wondering if anyone has tried the new 8GB SD card on the Universal? dose it works?
BTW,My hx4700 which is 2004's unit and it works perfectly with the 8GB CF card. so...the new HCSD card will be working too?
I am using the ADATA 4GB 150X card too,it will take at least 12seconds :shock: to boot the phone pad once I press the CALL button in device shut down mode,is that normal?
thanks,
best.
-LB

SDHC will not work on old and current devices IIRC it needs a special SDHC capable SD slot for it to work with the newer cards. Dunno when SDHC will come to mobile devices though as I fear that the trend is that manufacturer's are moving towards transflash [aka microSD] and miniSD.

my 4GB main SD card worked so well, i bought 4 more to encode movies on
now i need a better DVD ripper Wondershare pocket DVD stupid is too quirky. can't rip some DVDs, sometime frame seqences willl repeat dejavu...

bnycastro said:
SDHC will not work on old and current devices IIRC it needs a special SDHC capable SD slot for it to work with the newer cards. Dunno when SDHC will come to mobile devices though as I fear that the trend is that manufacturer's are moving towards transflash [aka microSD] and miniSD.
Click to expand...
Click to collapse
Thanks for the info bny,
that's a good news for my wallet ....

I've got a Goodram 4GB (x150) card, from Wilk S.A -Poland
works perfectly

4 GB 150X SD Card tried on O2 ?

I am about to buy a 4 GB 150x Class 2 SDHC Secure Digital Card for my recently bought O2 Neo handset. I would like to know if anyone has tried this earlier and knows if it works.
Umesh
O2 Neo

i have a-data 4gb turbo sd 150x and it works well

Thanks Speeed. Do you know if that is a Class 2 SDHC. I remember reading some post here which said a SDHC 2.0 format might not be compatible with HTC Prophet.

is SDHC working in a prophet?
Hey Umesh, I do have exactly the same question. I already have a 1 GB SD card. But now I need to upgrade and I am wondering if I can buy a SDHC class 2 or even SDHC class 6 card. Can you please post your experiences.
ADVAthanksNCE, Peter

umesh said:
I am about to buy a 4 GB 150x Class 2 SDHC Secure Digital Card for my recently bought O2 Neo handset. I would like to know if anyone has tried this earlier and knows if it works.
Umesh
O2 Neo
Click to expand...
Click to collapse
I have the Transcend 150x 4gb SD working in my Prophet for almost a year. The only issue is one that applies to all SD cards and not just the 4gb, that is today plugins sometimes don't like to be on the SD card, otherwise everything works perfectly. It seems to me I remember at the time I bought my 4gb SD card there were some models that had issues with the Prophet. I guess you could just get one of the cards that has already been proven to be compatible.

transcend card
I also have a 4gB transcend card that works perfectly....

gujjuman said:
I also have a 4gB transcend card that works perfectly....
Click to expand...
Click to collapse
You can order one here, they have others for sale too, but you might want to get one that works for sure.
http://www.newegg.com/Product/Product.asp?Item=N82E16820163159

Topram 4Gb
I have a Topram 4Gb 150x sd card and have had no problems. I got it from Ebay.
please note it uses SD 1.1, which is the maximum the Prophet supports.
check it out here:
http://cgi.ebay.co.uk/TOPRAM-150X-4...ryZ18871QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Hi,
I have a samsung oem 4go 150x, bought on ebay from fastmemoryman, and it is also working perfectly on my prophet.

Topram and Soho failed. Still looking for a good 4GB card!
Hello guys,
Here's my experience with 4GB SD card dilemma using a Qtek s200:
1) Topram 150X:
*Works ok till 2GB but data written beyond 2GB can not read back.
*Surprisingly there's no error after chkdsk, xp-scan.
*No error when writing beyond 2GB but data is not really written.
*Original content of the sectors do not change at all.
*Deep analysis under WinHex states defect starting at sector #3964927 of about 8 million sectors.
* FAT16 and FAT32 all formatting combinations possible on Qtek as well as XP which is surprising. No error using Panasonic SD Formatter as well. This card doest not react to any write operation, even if it fails !!!
SOLUTION: Created a 2GB partition using WM5torage + XP and bypass defected area.
2) SOHO 150X:
*Looks horrible with 5th class sticker misaligned.
*Comes with 90MB of defected sectors already marked bad in FAT.
*Healty reformatting impossible.
*All sectors beyond 1GB are unreadable & unwritable.
SOLUTION: Sent it back to the seller.
QUESTION TO ALL POSTS CLAIMING TRANSCEND & A-DATA WORKS WITH NO PROBLEM:
Of course the 4GB SD's are recognized well when insterted in Prophet. But did you go beyond 2GB and up to 4GB? I strongly need someone who would confirm having written full 4GB and able to read it back with no data loss !!!
I think just inserting the card and seeing 3800MB something free means NOTHING and you should load the card completely without no data loss to be sure everything is OK.
Many posts claim problem with camera not saving to card. No sense anymore, it's not related to the cards but the cam.app as the free space calculation issue is well known now.
Waiting for some good news about Trancend and A-Data which i want to try asap...

SHHC not compatible with Prophet
Not yet tried but given all the information on various sources, Prophet has no chance to recognize any SDHC card. When inserted we will probably won't see anything. Like a RAW card.
The most logical explanation is that the CSD layer of SD2.0 is organized diffently than SD1.1.
Didn't see yet any opportunity to use them with a future ROM update. The hardware limitations of the reader on prophet may be the cause.

g3k said:
Hello guys,
Here's my experience with 4GB SD card dilemma using a Qtek s200:
1) Topram 150X:
*Works ok till 2GB but data written beyond 2GB can not read back.
*Surprisingly there's no error after chkdsk, xp-scan.
*No error when writing beyond 2GB but data is not really written.
*Original content of the sectors do not change at all.
*Deep analysis under WinHex states defect starting at sector #3964927 of about 8 million sectors.
* FAT16 and FAT32 all formatting combinations possible on Qtek as well as XP which is surprising. No error using Panasonic SD Formatter as well. This card doest not react to any write operation, even if it fails !!!
SOLUTION: Created a 2GB partition using WM5torage + XP and bypass defected area.
2) SOHO 150X:
*Looks horrible with 5th class sticker misaligned.
*Comes with 90MB of defected sectors already marked bad in FAT.
*Healty reformatting impossible.
*All sectors beyond 1GB are unreadable & unwritable.
SOLUTION: Sent it back to the seller.
QUESTION TO ALL POSTS CLAIMING TRANSCEND & A-DATA WORKS WITH NO PROBLEM:
Of course the 4GB SD's are recognized well when insterted in Prophet. But did you go beyond 2GB and up to 4GB? I strongly need someone who would confirm having written full 4GB and able to read it back with no data loss !!!
I think just inserting the card and seeing 3800MB something free means NOTHING and you should load the card completely without no data loss to be sure everything is OK.
Many posts claim problem with camera not saving to card. No sense anymore, it's not related to the cards but the cam.app as the free space calculation issue is well known now.
Waiting for some good news about Trancend and A-Data which i want to try asap...
Click to expand...
Click to collapse
Friend. I have been using the Transcend 4gb 150X with my prophet for almost a year and let me tell you that baby is full!!! I have my GPS maps, a few videos, some big apps, and the rest filled with as much music as I can cram into the thing. It works without any problems at all, I also specify images to be saved directly to the card with no problems. I am not the only one that has reported compatibility with the Transcend.

g3k said:
QUESTION TO ALL POSTS CLAIMING TRANSCEND & A-DATA WORKS WITH NO PROBLEM:
Of course the 4GB SD's are recognized well when insterted in Prophet. But did you go beyond 2GB and up to 4GB? I strongly need someone who would confirm having written full 4GB and able to read it back with no data loss !!!
I think just inserting the card and seeing 3800MB something free means NOTHING and you should load the card completely without no data loss to be sure everything is OK.
Many posts claim problem with camera not saving to card. No sense anymore, it's not related to the cards but the cam.app as the free space calculation issue is well known now.
Waiting for some good news about Trancend and A-Data which i want to try asap...
Click to expand...
Click to collapse
+1
I'm using 4go SD card for more than a month... it is almost full and no problem with any kind of data...
So, it work perfectly.
For those than can't save photos on SD card, this has nothing to do with the SD card format. It depends on if you've unlocked Ext rom or not. It depends also of the rom you've installed on your prophet, some home cooked rom than have native unlocked ext rom will show the same issue.

4GB SD cards on Prophet
Thanks matterhorn for making it more precise. It's very nice to hear such clear feedback.
...and Cedric, are you also talking'bout a Transcend?
I guess you both use your cards on the PC using regular card readers. 2GB and FAT32 compatibility should be enough o cope with 4GB. If the card is healty, i see no reason why a recent, non-SDHC reader would not work with 4GB SD.
I also guess you didn't have any problem using full capacity after re-formatting. Reformatting should not be a problem for a good 4GB card to become bad.
I think i'll give another try with Transcend which is a reliable company and registered to sdcard.org while SOHO and TOPRAM are not. In my language, we call them MANUFACTURERS WORKING UNDER THE STAIRS.

g3k said:
Thanks matterhorn for making it more precise. It's very nice to hear such clear feedback.
...and Cedric, are you also talking'bout a Transcend?
I guess you both use your cards on the PC using regular card readers. 2GB and FAT32 compatibility should be enough o cope with 4GB. If the card is healty, i see no reason why a recent, non-SDHC reader would not work with 4GB SD.
I also guess you didn't have any problem using full capacity after re-formatting. Reformatting should not be a problem for a good 4GB card to become bad.
I think i'll give another try with Transcend which is a reliable company and registered to sdcard.org while SOHO and TOPRAM are not. In my language, we call them MANUFACTURERS WORKING UNDER THE STAIRS.
Click to expand...
Click to collapse
I use an normal SD card reader to format my card in FAT32 using XP every time I change my ROM, just to make sure there are no hidden nasties to cause problems. Newegg.com has good prices on the Transcend .
Also that tip about the unlocked extended ROM is a good one. When you can have 4gb, who cares about a few megabytes.

So can I assume to confirm the usability of a 4 GB card on my Neo -
If I slide in the 4 GB Card and it shows full memory (4 GB) as available in Memory Status --> Storage Card - that would imply that the full card is (read/write) compatible in the device?
Matterhorn, is your working 4 GB card SDHC 2.0 format ?
Practically, at best I would have only about a couple of minutes to test the 4 GB card at the store where I buy.

1GB SD Card for Magician???

I'm looking to buy an SD card for my MDA Compact...would you recommend a particular brand? please list the ones that are incompatible. I'm looking for one that is most compatible and can be used with GPS software as well as playing music. what is the minimum RW speed required to achieve this. thanks alot in advance

As all the SD cards are really cheap now I would suggest a 4GB SD (Note: Not SDHC - the HC will not work) which I believe would be the maximum storage size for magician.
That's a little rare, if that's not possible for you to find then a 2GB MicroSD with Adapter would be my second choice - after your magician retires you still have a MicroSD to play around with.
Just my 3 cents.
Regards,
Philip

If its any help i use a 1gb Sandisk one and its been working perfectly for over a year now.

I ran the Kingston 1GB, and a Transend 1GB aswell as a 2BG transend from a friends Digi-cam, now i stumbled on a strange thing The 4GB kinston/transend cards dont work for me, BUT i got this 4gb SILICON POWER 80x SD card for my digicam, and IT WORKS, and ultra fast,
takes 1-2 second to access it, while it took around 5 to access the 2bg cards
ill post a link of it so u can try to find it at your local stores
http://www.digitalmediastore.co.uk/..._Speed_80x_Secure_Digital_Card__SIL-SD4HS80-D
(Qtek-S100)-(MDA-T-Mobile)