0item(s)

You have no items in your shopping cart.

 

Remember my visit?

Join our mailling list and we will remember your basket contents if you decide to come back later.

We value your privacy, and as detailed in our privacy policy we will never sell your email.

I would like to subscribe to the 7dayshop.com mailing list

Memory card storage sizes VS actual storage capacity

Storage Size (1GB = 1024mb)Usable Capacity (Approx)
1GB 961 MB (0.94 GB)
2GB 1,908 MB (1.86 GB)
4GB 3,880.96 MB (3.79 GB)
8GB 7,690.24 MB (7.51 GB)
16GB 15,360 MB (15 GB)
32GB 30,412.8 MB (29.7 GB)
64GB 60,958.72 MB (59.53 GB)
128GB 122,071 MB (119.21 GB)
256GB 244,140 MB (238.41 GB)
512GB 488,281 MB (476.83 GB)
1,024GB (1TB, Terabyte) 976,562 MB (953.67 GB)
2,048GB (2TB, Terabyte) 1,953,125 MB (1907.34 GB)
4,086GB (4TB, Terabyte) 3,906,2509 MB (3814.69 GB)
8,192GB (8TB, Terabyte) 7,812,500 MB (7629.39 GB)
16,384GB (16TB, Terabyte) 15,625,000 MB (15,287.80 GB)
32,768GB(32TB, Terabyte) 31,250,000 MB (30,517.57 GB)


Why Advertised Storage Does Not Match The Usable Data Capacity

The main reason comes down to differences in the way that operating systems, such as Windows display storage devices, and how USB Flash Drive & other storage device manufacturers advertise the storage capacity.

Computers are based on binary math, which means storage is counted using base 2, not base 10, which storage is advertised as. So, while we measure a kilobyte as 1,000 bytes, Windows refers to a kilobyte as 1,024 bytes.

Let's take an example of a 256GB Flash Drive.

From the manufacturer's point of view, 256GB will have 256*1000*1000*1000 = 256,000,000,000 bytes.

However, computers are calculated in Binary (base 2), so 256GB is actually 256*1024*1024*1024 = 274,877,906,944 bytes.

Hence the discrepancy!

There are also other factors to take in to account as some storage capacity is allocated for overheads, such as the boot data and file system.


What does SDHC Class X Mean? 

Well the simple answer is it relates to the performance of the memory card - where the higher the number equals better performance. Take a look at this table for more information on current SDHC Classes.

ClassMinimum performance Application
SDHC Speed Class 2.svg Class 2 MB/s SD video recording
SDHC Speed Class 4.svg Class 4 4 MB/s High-definition video (HD) recording including Full HD (from 720p to 1080p/1080i)
SDHC Speed Class 6.svg Class 6 6 MB/s
SDHC Speed Class 10.svg Class 10 10 MB/s Full HD (1080p) video recording and consecutive recording of HD stills (high-speed data bus)
UHS Class 1.png UHS Speed Class 1 (U1) 10 MB/s Real-time broadcasts and large HD video files (UHS bus)
UHS Class 3.png UHS Speed Class 3 (U3) 30 MB/s 4K video files (UHS bus)

So how many pictures can my camera store on a memory card?

Megapixels

File size (MB)

1GB

2GB

4GB

8GB

16GB

32GB

64GB

128GB

4MP

1.2

715

1430

2861

5722

11444

22888

45776

91552

5MP

1.5

572

1144

2288

4577

9155

18310

36620

73240

6MP

1.8

476

953

1907

3814

7629

15258

30516

61032

7MP

2.1

408

817

1634

3269

6539

13078

26156

52312

8MP

2.4

357

715

1430

2861

5722

11444

22888

45776

10MP

3.0

286

572

1144

2288

4577

9155

18310

36620

12MP

3.6

238

476

953

1907

3814

7629

15258

30516

14MP

4.2

204

408

817

1634

3269

6539

13078

26156

16MP

4.8

178

357

715

1430

2861

5722

11444

22888

22MP

6.6

130

260

520

1040

2080

4161

8322

16644


What about my DSLR? In Uncompressed RAW format?

Megapixels

File size (MB)

1GB

2GB

4GB

8GB

16GB

32GB

64GB

128GB

4MP

12.0

71

143

286

572

1144

2288

4576

9152

5MP

15.0

57

114

228

457

915

1831

3662

7324

6MP

18.0

47

95

190

381

762

1525

3050

6100

7MP

21.0

40

81

163

326

653

1307

2614

5228

8MP

24.0

35

71

143

286

572

1144

2288

4576

10MP

30.0

28

57

114

228

457

915

1830

3660

12MP

36.0

23

47

95

190

381

762

1524

3048

14MP

42.0

20

40

81

163

326

653

1306

2612

16MP

48.0

17

35

71

143

286

572

1144

2288

22MP

66.0

13

26

52

104

208

416

832

1664

Before you go...join our mailing list?

Our emails are packed full of new products, special offers and 7dayshop.com news. You'll be the first to know when there's a promotion going on!

We will also remember your cart contents if you decide to come back later.

We value your privacy, and as detailed in our privacy policy we will never sell your email address.

I would like to subscribe to the 7dayshop.com mailing list