128GB Card

Discussion in 'SJ7 Star' started by TSH, Jul 25, 2017.

  1. TSH

    TSH New Member

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    I just bought the cam and would like to know which 128GB sd card is recommended for the cam? How important is the speed of the card?
     
    TSH, Jul 25, 2017
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  2. Kailash Jobanputra

    Kailash Jobanputra New Member

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    Speed of the card is very important if you want to record 4K videos. I would recommended atleast class 10 memory card. Personally I have not tried 128 GB card in the camera, but I use the 64 GB Samsung EVO Plus (100 MBPS) class 10 card and its working very nice. I you don't want to shoot 4 K videos then the least recommendation would be to buy class 6 or above card. Don't go below class 6 as then your videos will be pathetic.
     
    Kailash Jobanputra, Jul 26, 2017
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  3. WildThang

    WildThang New Member

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    I think class 10 for sjcams is minimum. UHS 3 is when the camera is more comfortable. Slow memory cards tend to be a problem.
     
    WildThang, Jul 26, 2017
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  4. TSH

    TSH New Member

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    Big thanks for the help!!! I want to record everything in 4K. This is why I would go for 128GB. What speed is recommended for 4K recording?
    Some Class 10 cards have a speed of 80 MB/s and other Class 10 cards have up to 270 MB/s but costs ways more. Is 80MB/s really Class 10 as that would be 3 times slower as 270MB/s Class 10 cards?
     
    TSH, Jul 26, 2017
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  5. gal8gal

    gal8gal New Member

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    for 4k video you need at least 60 MB/s write speed (not read speed).
     
    gal8gal, Jul 26, 2017
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  6. kamkar

    kamkar Elite

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    No he dont you are confusing the 60 mbit bitrate ( Mb/s ) 4K is recorded in, with the MB/s used to say how fast memory cards are.

    Try to set your SJ7 camera to 4K and record a 3 minute long file, then take the size of that file xxxx Megabytes and divide that with the 3 minutes ( 180 seconds ) you have recorded and you will see what speed in MB/s the camera was writing to the memory card.

    The Sj7 star really just need a good class 10 U1 card with a write speed over 20 MB/s

    BUT ! i have been using my 128 Gb Toshiba U3 card in the SJ7 and it work fine though it is a slow U3 card with just 30 - 40 MB/s write speed.

    http://sjcamhd.com/community/threads/sj6-legend-jerky-video.167/#post-792

    If what you say is true then with 60 MB/s that will be 600 MB for just 10 seconds for recording and so a 1 minute 4 K recording should be 3600 MB or 3.5 Gigabytes in size.

    Not even expensive Sony action cameras that can use 100 mbit bitrate will create that big files for a 1 minute recording.
     
    Last edited: Jul 27, 2017
    kamkar, Jul 27, 2017
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  7. TSH

    TSH New Member

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    TSH, Jul 28, 2017
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  8. kamkar

    kamkar Elite

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    That should do you just fine, i am looking myself to add one of those to my test suite of memory cards.
     
    kamkar, Jul 28, 2017
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  9. Ray Sanders

    Ray Sanders New Member

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    Samsung 128GB EVO+ UHS-I microSDXC Memory Card
    This is the card I use and it works great.
     
    Ray Sanders, Aug 1, 2017
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