SanDisk 4GB Extreme III Compact Flash Memory Card

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This item is no longer available.

About SanDisk

SanDisk Extreme III CompactFlash is designed for serious professional photographers who demand one of the fastest, most rugged and most durable memory cards on the market. Professional photographers who work under less than ideal conditions expect more from a flash memory card. More speed. More performance. More reliability. SanDisk's Extreme III card delivers everything you want plus a whole lot more.

That's because only SanDisk Extreme III memory cards feature innovative ESP technology for the fastest speeds and highest performance. ESP stands for "Enhanced Super-Parallel Processing". Simply put, it means you are getting the fastest read / write speeds available, speed you'll definitely appreciate whenever you find yourself shooting and storing pictures in harsh environments, extreme temperatures or at high altitudes.

Summary of Customer Reviews

Customers most agreed on the following attributes:
Reliable (197),Great value (134),Writes/reads fast (125),Large capacity (95),Fast (52),Lightweight (28),Excellent interface (27),Large capacity / good size (5),Highly compatible (4),Strong construction (3)
Small capacity (7)
Best Uses:
Easy to use (135),Portable images/multimedia (114),Storing images/multimedia (71),Digital photography (49),Image storage (19),Digital capture (17),Image transportation (14),Cameras (8)
Reviewer Profile:
Enthusiast (75),Semi pro (47),Professional (34),Photo enthusiast (27),Semi-pro photographer (12),Pro photographer (8),Casual photographer (5),Tech professional (3),Tech savvy (3)

SanDisk Features

  • Designed to meet the critical speed and performance needs of serious professional photographers - lets you quickly capture, view, upload and transfer large image files
  • Ideal for demanding photo shoots under severe weather conditions - heat, cold, wind, rain, snow, etc.
  • Durable, reliable and thoroughly tested - temperature tested (heat and cold); shock and vibration tested (industrial-grade RTV included for CompactFlash)
  • Data recovery software- ensures your photos will always be there (even if you delete them accidentally)
  • Dedicated, priority technical support hotline for direct customers of SanDisk Extreme products
  • Included travel case keeps your memory cards organized

SanDisk Specifications

Form Factor
CompactFlash Card
Product Type
Flash memory card
Read Rate
30 MB/s
Storage Capacity
4 GB
Write Rate
30 MB/s
Packaged Quantity
Product Line
SanDisk Extreme
Software Type
SanDisk RescuePRO
Max Operating Temperature
185 °F
Min Operating Temperature
-13 °F
SanDisk Warranty
Mfr #

Reviews about this item

Review Snapshot®


(based on 221 reviews)


of respondents would recommend this to a friend.

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Most Liked Positive Review


The only CompactFlash Card to get!

The SanDisk Extreme III is an excellent CompactFlash memory card. Always reliable in the heat and humidity of location shoots and the 30mb/s R/W cycles is more than adequate for my Nikon cameras...could not be better.

Reviewed by 221 customers


Fast and Dependable


from Amherst, MA  -  Hobbyist/Enthusiast

Use with Canon 40D and has always worked well. Don't take a lot of acton shops, so not shooting in large bursts. But, for candids and travel works great and uploads fast. Dependable - haven't had any problems.


Great bad it's discontinued.


from summit county  -  Hobbyist/Enthusiast

These cards are great. I've had them for two years without any problems. Would love it if you could still get the "buy 6 and get $50 back" deal. I wish these weren't discontinued as they have really stood the test of time (and time in digital flies by very quickly).


Good memory card


from Grand Junction, CO  -  Hobbyist/Enthusiast

I don't know if Extreme III is needed over more ordinary cards, but if i recall correctly, Adorama had a special on it, so why not? Maybe if I ever photograph in the Antarctic or other extreme environments, I'll be glad I have it instead of a more wimpy card.


Works well with the 5d2.


from behindz joo!  -  Semi Pro

Acquired these toys during a black friday deal couple years ago. Basically 3 for [$] and you got [$] back after mailing the rebate, basically you got them for free. we use them for photos, video, in-fact I was using them last night to shoot a preview. :) There are fast, even faster than some of the newer faster cards out there. Also used them with ML at higher bitrate quality and they survived but not highest quality(60-75Mbps+) for long periods.


Reliable, fast card.


from Hammond, LA  -  Professional

Never a problem with these Sandisk Extreme III cards.


Good card


from Sparks, NV  -  Hobbyist/Enthusiast

Good card. Works as advertised.


Works flawlessly


from Green Bay, WI  -  Hobbyist/Enthusiast

I have been using Sandisk since I got my first digital camera in 2004 and I have yet to have one fail.


Excellent card


from Perrysburg, OH  -  Hobbyist/Enthusiast

I have been using 3 of these cards in my Canon 50D for over a year. I have had absolutely no problems with them. I always use SanDisk cards (I also have a 2g CF and an HDSC card for an XSi). I've never had a problem with any of them.


LOVE these cards... my go to brand


from Austin, TX  -  Professional

These cards are my absolute favorite. I haven't had any problems with them (knock on wood)... this is and will be my go to brand.


Good buy


from Metairie,LA  -  Semi Pro

Good capacity storage


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Shopper  Why Did You Choose This?
Jim K  Good equipment, good size, good deal. What more do you need, oh yea, free shipping! jim jmk-nbsc
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