06-13-2017 03:03 AM
Additionally, the controller within each SD card is designed and optimized differently depending on the manufacturer and model of the card. The controllers of SD cards implement a translation layer. For any I/O operation, a translation from virtual to physical address is carried out by the controller.
When it comes to the cameras processing and writing to the SD card, the cards Read speed means very little while the write speed it very important. Unfortunately, even if the manufacturer gives the write speed, they often don't designate Both sequential and random. While many cards will have a decent random write speed, only the best high end cards deliver fast sequential write speeds.
Finally, for 4K in the GoPro it’s reading the full width of the sensor, but not the full height – it’s capturing a 16:9 portion of the middle of the 4:3 full sensor. Since the final delivery is 4K, it doesn’t have to scale that initial capture at all. This capture window is identical for, say, 1080P Wide; however, it scales it down to 1080P for the final output. While the ultimate size of the file is smaller with 1080 over 4K, the processor within the camera needs to be able to process and write as quickly as possible no matter what the final resolution.
There are probably other reasons as well, but this is how I understand it.
06-13-2017 08:23 AM
Thank you very much for your comments.
Regarding MTP, indeed, it has a lot of issues! Especially with my phone (OnePlus 3T), creating folders, viewing content, etc. But Windows does not help either. I might try that fix, however, I tried the GoPro on 2 devices - my laptop with an older version of Windows 10 and updated, and computer, with one the latest version (fresh install) - so I doubt that is the problem.
"Why would you need to reformat the card to make it readable? Your card should be formatted as exFAT. This is readable by both Windows and GoPro cameras."
- as I said in the first post, I had this problem one time before, just after I started to use the camera and this was the only solution that I found. I am not sure what else to make so I can read the new data (after format) via USB. I will look into this a bit more when I get time.
Also, why are you using such a large card? I'm sure you have a good reason, I'm just curious. Since it's best practice to delete all the media from the card after transferring to your computer and since the battery will generally die long before you can fill a 64GB card. Add to that the cost of a 128GB card and that you get reduced performance from the card the bigger the storage, I don't know why people buy these cards for their cameras (except in cases of long time laps with an external power source of course).
- Probably not a good reason, but I wanted to make sure that I can store a lot of data, including previous holidays, etc. I do not want to be stuck with 5 days of shots, then be required to delete in order to free up space. So if I go on holiday now, another one after 1-2 months, I usually keep all the data there even though I copied everything on my computer.
Looking over here: https://gopro.com/help/articles/Block/microSD-Card-Considerations - I can see Samsung Pro Plus UHS-I 128GB (MB-MD128DA/AM), but I question, why is the 64 not compatible? For example this one: https://www.amazon.co.uk/dp/B00WIMBZR0 or even the newer, latest one: https://www.amazon.co.uk/dp/B06XFBGYLW - the speed is obviuosly not a problem as they seem amazing cards!
06-13-2017 09:14 AM
I've found that SD cards on the list can be reduced in storage and still work but not necessarily the other way around. In fact, I only use Samsung Pro and Lexar 1000X in both 32 & 64GB. The problem with the list is it's only the cards that have been tested and proved to work. A different make/model/size might work, but experience working with people reporting issues with their camera has shown that 99% of the time, getting the user to try a card on the list usually resolves whatever issue they are having. Sometimes there seems to be absolutely no correlation between the card and issue, but sure enough, they switch to a recommended card and run a manual update and the issue goes away.