http://www.mp3load.ws/mp3-sdhc-player/

Can I use a SD card instead a MMC?
I have this vintage Grundig mp3 player that has a slot for a 32MB MMC card (SD cards weren’t invented back then). If I insert a SD/SDHC card, will it work with it?
Cards 2GB and under : Quite unlikely since at the time of SD’s creation most devices had to have their firmware or hardware updated in order to understand that extra pin the SD cards had (and at the time had to pay the royalty to be able to utilize SecureDigital). Multimedia cards were quite simple had had one less pin as such almost any device understood them.
Cards 4GB and over (SDHC) : Definitely not.
In short 99.99% it will not work.
SuperCard DS One SDHC Quick View
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New-Motorola ZN300 GSM Unlocked Ce – MOTZN300 Motorola ZN300 GSM Unlocked Cell Phone. Motorola ZN300 is a mid-level quad-band GSM slider. It features 262k color display, 3MP camera, stereo Bluetooth, microSDHC slot for memory, Music player, FM Radio and Speakerphone…. |
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Discovery Kids MP3 Boom Box $38.89 Now pint-sized kids can rock out and dance to 20 pre-recorded songs or upload their own music using the built in SD memory card port or the included USB cable. This easy to play digital MP3 Boom Box by Discovery Kids features volume control and a 1.5″ LCD display screen. Store up to 160 songs from your PC (256 MB). Includes built in carry handle, kid-friendly buttons, and a headphone jack. For age… |
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SanDisk microSDHC 32GB Flash Memory Card (Retail Packaging) SDSDQM-032G-B35,Black $15.00 Now you can take your media files with you anywhere with the help of the SanDisk SDSDQM-032G-B35N Flash Memory Card. This flash memory card offers 32GB of additional storage so you can save more files, downloads and data. It is compatible to use with both microSD and microSDHC-compatible devices. Grab the SanDisk SDSDQM-032G-B35N Flash Memory Card and provide more room for your digital files…. |
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SanDisk 32GB microSDHC Memory Card (Bulk Package) $14.49 SanDisk® microSDHCTM mobile memory cards are the ideal companion for multimedia phones because they plug right inside the phone providing immediate expansion of memory storage needed for carrying more music, video, photos, games, and mobile software applications in the latest generation of phones…. |
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SanDisk 16 GB microSDHC Flash Memory Card SDSDQ-016G (Bulk Packaging) – Class 2 $2.67 SanDisk microSDHC mobile memory cards are the ideal companion for multimedia phones because they plug right inside the phone providing immediate expansion of memory storage needed for carrying more music, video, photos, games, and mobile software applications in the latest generation of phones. Features: SanDisk microSDHC Available in 32, 16GB, 8GB, 4GB capacities Seamless speed and performance wi… |
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PCMICROSTORE Brand SanDisk Sansa View Crystal Snap-On Case Cover with Removable Belt Clip For Sandisk View 8gb and Sandisk View 16gb – 5 Colors Choices $29.95 PCMicroStore Brand Non-OEM Case. 1 Year Unconditional Warranty if purchased through PCMicroStore… |
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PCMICROSTORE Brand SanDisk Sansa View Crystal Snap-On Case Cover with Removable Belt Clip For Sandisk View 8gb and Sandisk View 16gb – Bundled with 12v Rapid Premium Car Charger and Home Travel Wall AC Adapter Charger – 5 Colors Choices $59.95 PCMicroStore Brand Non-OEM Case. 1 Year Unconditional Warranty if purchased through PCMicroStore… |
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HP – Flash memory card – 4 GB – microSDHC 647444-B21 $89.69 HP – Flash memory card – 4 GB – microSDHC HP provides high performance MicroSDHC flash memory for customers who require boot from flash for integrated hypervisors. The MicroSDHC allows the flexibility to support virtualized environments across the HP ProLiant portfolio. This HP MicroSDHC flash memory is a SLC (single-level cell) flash device which is different than a MLC (multi-level cell) devic… |
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Soundfly SD WMA/MP3 Player Car Fm Transmitter for SD Card, USB Stick, Mp3 Players (iPod, Zune) $34.95 Soundfly SD lets you listen to sound files such as MP3 & WMA file stored in portable memory devices like USB flash memory & SD card, etc through your car radio speakers. It supports RDS (Radio Data System), so while listening to music, you can see the song and artist’s name displayed on your car stereo. Soundfly SD transmits to all FM frequencies (88.1MHz-107.9MHz) and memorizes up to 7 FM frequen… |
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Soundfly AUX MP3 Player Car Fm Transmitter for SD Card, USB Stick, Mp3 Players (iPod, Zune, Sansa) with Remote Control $44.99 Soundfly AUX lets you listen to MP3 sound files stored in portable memory devices like USB flash memory & SD card, etc through your car radio speakers. Music can play through both Fm frequency and direct connection with Aux port in your car. 1.5 inch Black LCD screen shows playing time, artist name, song name, folder name. It also lets you navigate through files and folders in your portable memory… |