Capacity Card
The Technophobe’s Guide to SD Memory Cards
CF, SD, SDHC, Micro SD, MMC – Memory cards are used to boost the memory capacity of digital devices, from digital cameras to mobile phones, laptop computers, MP3 players and video game consoles. SD (Secure Digital) and SDHC (Secure Digital High Capacity) cards are the most common type of memory card in terms of non-professional use, with a capacity of up to 4GB for SD cards and 32GB for SDHC cards. Secure Digital is a non-volatile memory card format which Panasonic, SanDisk, and Toshiba developed for use in portable devices.
They are based on the older MMC (Multi Media Card) format, although with a number of differences. For example, they are asymmetrically shaped so that they are not inserted the wrong way up, and are physically thicker than the old style of memory cards, comprising dimensions of 32 x 24 x 2.1 mm. As a further protective measure, the electrical contacts of SD cards are positioned beneath the card’s surface to protect them from contact with a user’s fingers. SD cards generally have transfer rates of between 80 and 160 MB/s.
Types of SD Card
Nothing technologically terrifying here, just a few simple definitions to remember! SD cards have a maximum capacity of 4GB, above that the inits “HC” are added to denote “High Capacity”. So, SD cards range from 1GB to 4GB, with SDHC cards blazing ahead with a whopping 32GB memory.
Compatibility is the issue here, because whilst devices designed for SDHC cards (2.0 technology) are backwards compatible (meaning they work with both SD and SDHC cards) the same cannot be said for older devices that were designed before 2.0 technology, and therefore only operate with SD 1.0 and 1.1 technology. The most basic way to check is to look for the “SDHC” logo on a device (many original SD compatible devices didn’t bother to include the logo “SD” due to the lack of similar competitors).
For those using an SD/SDHC card to take high-resolution photographs, speed can make a huge difference to the quality of the end result. For example, with slower cards, a camera’s burst mode might only be able to take a few photos before its buffer fills up, leaving a tiresome wait for the user while files write to the card. The modern camera goes everywhere! Users capturing high numbers of hi-resolution action shots might find that higher speed SD/SDHC cards will boost the performance of their camera.
Most SD cards display a number on them – 2, 4, 6, or 10 – to indicate their ‘class speed rating’ which refers to the minimum write speed in MB/seconds. Sandisk’s class 4 cards, for example, have transfer speeds of 15 MB/sec, their class 6 cards – 30 MB/sec. Most new devices are, again, backwards compatible, however a nice little warning tends to pop up on screen (including the devices optimum speed capability) when an incompatible card is inserted.
With the market flooded, online retailers like www.memorycardzoo.co.uk tend to be the best places to look for deals, seek advice (the telephone staff at Memory Card Zoo are unbelievably knowledgeable about all things digital!) and read impartial reviews.
About the Author
The Article is written by memorycardzoo.com/ providing memory cards and micro sd cards Services. Visit http://www.memorycardzoo.com/ for more information on memorycardzoo.com/Products & Services___________________________Copyright information This article is free for reproduction but must be reproduced in its entirety, including live links & this copyright statement must be included. Visit memorycardzoo.com/ for more services!
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Rolodex Rolodex Low Profile Business Card Book 72 Card Capacity Rose (76650) $12.39 |
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20 Pcs Capacity PVC Bank Business VIP Card Holder Blue $4.54 |
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Sandisk 4 Gb Microsd High Capacity (microsdhc) 1 Card/pack (sdsdqm004gb35n) $9.90 |
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Sandisk4 Gb Microsd High Capacity (microsdhc) 1 Card/pack – Sandisk $10.33 |
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Cardinal Brands Crd-65325 Cardinal 65325 Business Card Album 25 Capacity3-ring $23.92 |
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Black 36PCS Capacity ID VIP Name Card Holder Organizer $5.33 |
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16gb Secure Digital High Capacity (sdhc) Class 6 Card With Card Reader – 16 Gb - $20.68 |
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Capacity 20 Pcs PVC Bank Business ID Card Holder Brown $4.60 |
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Black 180 Pcs Capacity Plastic Pocket Name Card Book $8.94 |
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Office Name ID VIP Business Card Holder 20 Pcs Capacity Black $3.97 |
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Duracell 4GB Secure Digital High Capacity (SDHC) Card $14.95 |
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Fashion Faux Leather Name Card Book 480 Capacity Black $21.27 |
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120PCS Capacity Faux Leather Cover Business Card Holder $12.24 |
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HP 4GB SD HIGH CAPACITY MEMORY CARD NEW SEALED $7.99 |
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Black 120PCS Capacity ID VIP Name Card Holder Organizer $7.46 |
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Rolodex Business Card Book Holder 96 Card Capacity $2.99 |
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Business Black 20 Pcs Capacity ID VIP Name Card Organizer $3.96 |
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Deflecto Desktop Business Card Holder, 400-Card Capacity, Black $16.91 |
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Office Name ID VIP Business Card Holder 20 Pcs Capacity Black $4.36 |
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Capacity 20 Pcs PVC Bank Business ID Card Holder Brown $4.64 |
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Press Stud Button 52 Sheets Capacity Credit Card Holder $6.59 |
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Dane Elec 4GB Secure Digital High Capacity Memory Card $8.99 |
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LOT 10 x BLUE SDHC 8 GB High Capacity memory card 8 G SD + free JEWEL CASE $31.00 |
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OCZ Technology – OCZSDHC6-8GB 8GB Secure Digital High Capacity Card (Class 6) $35.40 |
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Brown 18PCS Capacity ID VIP Name Card Holder Organizer $4.62 |
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Stitched Brim 40 Pages 240 Pcs Capacity Business Card Holder $9.33 |
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Stitched Brim 40 Pages 240 Pcs Capacity Business Card Holder $9.67 |
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Eye-Fi 8GB Pro X2 Secure Digital High Capacity (SDHC) Card with USB Card Reader $98.32 |
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Eye-Fi Mobile X2 EYE-FI-8MD-EU 8 GB Secure Digital High Capacity (SDHC) – 1 Card $80.62 |
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Kingston 16GB Secure Digital High Capacity SDHC Flash Card – SD4/16GB $16.50 |
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240 PCS Capacity Pocket Plastic Name Card Book Black $7.56 |
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Patriot Memory PSF32GMCSDHC10 32GB microSD High Capacity SDHC Memory Card New $49.15 |
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Patriot Memory Signature PSF8GSDHC10 8 GB Secure Digital High Capacity SDHC Card $10.81 |
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Black 36PCS Capacity ID VIP Name Card Holder Organizer $4.80 |
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FULL CAPACITY. 32GB MICRO SDHC MEMORY CARD. CLASS 10+ADAPTER. $17.36 |
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Rolodex 72 Card Capacity Business Card Holder $5.99 |
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Rolodex 72 Card Capacity Business Card Holder $5.99 |
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Rolodex 72 Card Capacity Business Card Holder $5.99 |
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IBM PROC CAPACITY CARD 53P5299 $302.40 |
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IBM PROC CAPACITY CARD ASSM 53P5293 $252.00 |
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IBM PROC CAPACITY CARD 53P5295 $252.00 |
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16 GB SDHC High Capacity CLASS 10 Card BRAND NEW $29.99 |
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Rolodex® Metal Open Rotary Card File, Black, 1 3/4″ x 3 1/4″, 250 Card Capacity $4.99 |
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CISCO VOICE INTERFACE CARD HI CAPACITY VOICE PORT ADAPTER T1/E1 PAVXC2TE1 $2,207.09 |
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Kingston Sd4-8gb 8gb Secure Digital High Capacity (sdhc) Card – Class 4 $7.69 |
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Hewllet Packard 4gb Microsd High Capacity (microsdhc) Card (l1882a) $8.01 |
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Kingston Sd4/16gb 16gb Secure Digital High Capacity (sdhc) Card – Class 4 $12.50 |
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Business Black 96 Pcs Capacity ID VIP Name Card Organizer $6.59 |
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Duracell 4GB Secure Digital High Capacity (SDHC) Card $19.99 |
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PS2 Memory Card 64 MB TTX Tech BLACK New (Playstation 2 64MB Capacity Storage) $8.99 |
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Stitched Brim 40 Pages 240 Pcs Capacity Business Card Holder $9.48 |
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Rolodex Rol-66490 120 Card Capacity Zipper Bus Card Holder – 120 Capacity $15.91 |
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Avery Dennison Ave-25410 Avery Tabbed Business Card Page – 100 Capacity – 3.5″ X $7.87 |
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Lexar Media Lsd8gbfsbnahd 8gb Secure Digital High Capacity (sdhc) Card $15.85 |
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Rolodex Rol-1734452 Pink Envelope Card Book – 72 Capacity – Pink Leather Cover $14.50 |
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Sandisk Sdsdb016ga11 16gb Secure Digital High Capacity (sdhc) Card – Class 2 - $20.79 |
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Rolodex Rol-22336 Explorer Business Card Binder – 96 Capacity – 6″ X 4″ – Brown $33.49 |
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Rolodex Rol-82341 82341 Neo Classic Business Card Book – 96 Capacity (rol82341) $16.35 |
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Lexar Media 4gb Secure Digital High Capacity (sdhc) Card – 4 Gb (lsd4gbfsbnahd) $11.78 |
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Anglers Company Ltd. Ang-303 Anglers 3-ring Business Card Binder – 1000 Capacity $15.40 |
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Dane Elec 4GB SDHC Class 4 High Capacity Secure Digital SD Memory Card $3.25 |
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Rolodex Rol-26507 Business Card Book – 240 Capacity (rol26507) $22.24 |
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Delkin 8GB Secure Digital High Capacity (SDHC) Memory Card $19.95 |
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Rolodex Rol-82339 Personal Business Card Book – 36 Capacity (rol82339) $7.75 |
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Rolodex Rol-22337 22337 Business Card Binder – 240 Capacity – 6″ X 4″ – Brown $28.80 |
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Sandisk 8 Gb Microsd High Capacity (microsdhc) 1 Card/pack – Class 2 $12.24 |
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Sandisk 8 Gb Microsd High Capacity (microsdhc) 1 Card/pack (sdsdqm008gb35a) $12.77 |
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Sandisk 4294967296byte Secure Digital High Capacity (sdhc) 1 Card/pack $8.43 |
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Delkin 4GB Secure Digital High Capacity (SDHC) Memory Card $9.95 |
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Kingston Technology 4GB Class 4 Secure Digital High Capacity (SDHC) Memory Card. $5.95 |
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Transcend 8gb Secure Digital High Capacity (sdhc) Card – Class 2 – 8 Gb $15.11 |
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60PCS Capacity Faux Leather Cover Business Card Holder $10.27 |
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Black 96 Pcs Capacity Plastic Pocket Name Card Book $5.99 |
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New high quality micro card TF Flash card capacity 2GB Memory Card bestdeal V* $0.01 |
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New 2GB Flash Micro SD Memory Card TF card Capacity M1 $0.01 |
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4GB SD Memory Card Capacity For Camera Good M1 $0.01 |
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High Capacity 8GB Micro SD TF MicroSD TF Memory Card 8GB 8 GB with SD Adapter $3.75 |
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High Capacity 4 GB Micro SD TF MicroSD TF Flash Memory Card 4GB + SD Adapter $0.99 |
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Black Faux Leather Cover 180 Pcs Capacity Card Holder $7.70 |
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New 2GB Flash Micro SD Memory Card TF card Capacity M+ $0.01 |
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New Lovely Hello Kitty Business Bank Credit Card Holder Bag Capacity of 10pcs $0.99 |
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16G 16GB High Capacity Micro SD SDHC TF Flash Memory MicroSD Card + SD Adapter $0.99 |
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16GB High Capacity Micro SD SDHC TF Flash Memory Card + SD Card Reader Adapter $0.01 |
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Office Name ID VIP Business Card Holder 20 Pcs Capacity Black $3.99 |
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R3 Reader – SD SDHC Card Reader support 2GB 4GB 8GB 16GB 32GB 64GB Capacity * R3 $4.25 |
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PORTE-CARTES Business Card Holder, 96 capacity card holder $3.99 |
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R12 Reader – SD SDHC Card Reader support 2GB 4GB 8GB 16GB 32GB 64GB Capacity R12 $7.95 |
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Eye-Fi 8GB Pro X2 Secure Digital High Capacity (SDHC) Card with USB Card Reader $99.99 |
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Eye-Fi Mobile X2 EYE-FI-8MD-EU 8 GB Secure Digital High Capacity (SDHC) – 1 Card $81.99 |
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Patriot Memory PSF32GMCSDHC10 32GB microSD High Capacity SDHC Memory Card New $49.99 |
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Patriot Memory Signature PSF8GSDHC10 8 GB Secure Digital High Capacity SDHC Card $10.99 |
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Black 180 Pcs Capacity Plastic Pocket Name Card Book $9.42 |
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20 Pcs Capacity Plastic Bank Credit Card Holder Green $4.60 |
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High Capacity 8GB Micro SD TF MicroSD TF Memory Card 8GB 8 GB with SD Adapter $3.26 |
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Business Black 20 Pcs Capacity ID VIP Name Card Organizer $4.08 |
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120PCS Capacity Faux Leather Cover Business Card Holder $8.67 |
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SanDisk Extreme 128 GB Secure Digital Extended Capacity (SDXC) – 1 Card – UHS $215.98 |
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SanDisk SDSDQM-008G-B35 8 GB MicroSD High Capacity (microSDHC) – 1 Card $12.69 |
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TF 2B 2G Micro SD Memory Card + Adapter +Case Real True Capacity! Fine Card $0.99 |
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TF 2B 2G Micro SD Memory Card + Adapter +Case Real True Capacity! $3.99 |
