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Checked on there web site says they can handle 32 GB cards. But you said something interesting you said you have SDHC cards, which are NOT the same as hd cards. So while a device may take one cared they will not take another card.
Not sure what the difference is but different they are. Try a larger SD card if you can find one, probably find the SD format will work fine but SDHC not at all.
I devised these simple steps that tend to remedy quite a few issues with most USB portable / external hard drives and devices (though not always)
A few things to check but assumes USB and Windows for other interfaces / operating systems similar steps may be adapted to suit.
1. Ensure it is connected directly to the computer to a USB 2.0 port not a USB 1.0 port as this can have effects on performance and reliability
2. Use only the cables that came with it NOT one that fits that may have been lying around or is longer. Not all USB cables are equal even though they should be)
3. Do not connect through an external USB HUB unless that hub is USB 2.0 AND has its own power supply.
4. Use ONLY the power supply that came with it if it has an external power supply Don’t use any other unless you know it has both the same voltage and current rating e.g. 12V 500mA anything rated below that would not work properly.
5. Always use the same port for connecting your devices. Some devices do not like being switched about. If switched they may want to install software / drivers again. This can be especialy true if you move a HUB to another port
If you checked and fixed anything there and still have issues then check your hardware from CONTROL PANEL / SYSTEM / HARDWARE.
Any exclamation marks by hardware need fixing before you investigate any further
I hate to be the bearer of bad news but from the sound of it you can't. At least not cheaply. The drive must be rebuilt to save the data. Your only option is to bring the drive to a HDD Recovery service for a Clean Lab Recovery. Expect to spend 600-1000.
here are several possibilities Bad Cable - Well it is probably unlikely, but I would first try another USB cable just to make sure the cable is not damaged. 2. Power Supply - Try another power supply if you have or can borrow one 3. Controller Failed – The Controller inside it has failed. 4.Drive Failure – The Hard Disk inside has failed.
Drives typically have an average 5 year lifespan, some last longer and
some can fail much sooner. Unfortunately, you rarely have any warning,
thus the need for backups.
there's no much need for instructions.
you just plug the hd into a USB port avaliable in your computer. the operating system should be able to recognize it a few seconds after you have plugged the hd into the usb port.
some hd may require for 2 usb to be connected to the computer for the computer to see it.. usually they come with a "y" usb cord. one goes to the hd and 2 usb type a cord go to 2 usb ports on the computer
to check to make sure the computer sees the hd. go into my computer and check if a removable storage device has appear.
also check your hd is on, some external hd may have switch to turn them on.
also check if your hd requires external power if it does it should come with a power connector that needs to be connected and plugged into the power outlet for it to work.
If I am right on this one the 4600 can only take a 250gig hd But I was wondering if you could partion the HD to 236.7 gigs twice so the computer only recognizes the 236.7 gig hd you will see two drives in my computer once you do just format both partitions unless you have another hd and then you will see three drives just do the ones you installed or you may loose your operating system, I don't even know if that will work, but I think it is worth a try seems you already have the 500gig drive, can't hurt to try, I sure hope this help some what.,