[phizinza]

I don't understand this whole 8gb class 4 being much slower then 4gb class 4? How does it make a difference? I've just got a 8gb class 4 Kingston and it doesn't seem to keep up with video recording. It chunks up ('stutters') and is un watchable. I have to record to the phone memory then transfer. But because my n79 only has 50mb I can only record about a minute long. Very annoying.

Interestingly I used a 4gb class 2 sandisk card and it seemed ok (but it was getting bad sectors for some unknown reason).

I thought getting a class 4 card would of solved this problem of speed, apparently not. I'm a little disapointed and am wondering weather I should go spend $$$ on a class 8 8gb card or if I am just not going to be able to have an 8gb card.? 

[radical24]

this is my simple understanding of it.. the more data that the card has to go through, the slower it is no matter how fast the card is. if it has to search 16gb of data vs. only 4gb of data to find the same folder, the amount of data is huge in comparison hence the 'slowness' of the card. 

[sockatume]

Also bear in mind that those speed ratings are minimums. The C4 4GB might actually be a C6 or better that they labelled as lower speed to keep up with demand for the cheaper cards.

[phizinza]

The file system (FAT32 in this case) should take care of this "searching" problem. That's why we have file systems... 

After plenty of reading I think its a fragment problem. I don't think the memory card is very good at moving from one area on it to another compared to a hard drive. Which to me is ridiculous, as its solid state and doesn't have to move a head to a certain part of the disk to find data.I defragged the card and it seems to work well.. But I can't see this being a long term solution because I've only been using this card for 2 weeks and have only got 2.5gb of data on it maximum.

The 8gb Kingston card writes at about 4.2mb per second when copying to it using my Laptops inbuilt card reader.

[sockatume]

That is the minimum speed you'd expect on a C4 card.

[phizinza]

The videos are only 500kb per second big.. so why would it have a problem if it can write at 4mb per second?

[sockatume]

That's a very good question. It may be that the 5800's implimentation of the card reader/writer isn't great, and so it's slower than it should be.

[phizinza]

I shall try and see how fast it can read and write using the USB cable.. Or even maybe put a file on the phone memory, copy it to the memory card and time it.