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Will the Samsung 64GB Evo Plus be sufficient for the Panasonic GX80/85 for 4K video?

I have recently purchased the Panasonic GX80 and need to get an SD card to go with it. I know nothing about cameras or SD cards. I am trying to find the cheapest, reliable card that will work well with the 4K video. My research has indicated that the Samsung card linked above should work fine with its (up to) 100 MB/s read and 60 MB/s write speed with class 10 and U3 compatibility. I've noticed that (for this product) the write speed scales with the memory size. I am really trying to determine if:

  • Is this card overkill / insufficient / fine for a beginner?

In addition to

  • I've read that Micro SD Cards with Adapters are preferred as full sized SD cards tend to break and with the micro SD cards it is trivial to replace the adapters. Is this nonsense or does it generally hold true?
  • Are Samsung SD cards generally reliable?

Most of my information comes from this forum post, which would now appear to be out of date. I won't ask about memory card size as I understand that this is completely subjective and situational. First time post here, so apologies if this is subjective / not the quality of question that you expect here. If so, I'll happily delete.

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What speed does my SD-card need?

The manual states that:

excerpt from GX80 manual

So any card that can continually write 100 Megabit per second (so around 13 MegaByte per second) should be fast enough for recording 4K. For photography, there's no hard number: usually, it's the faster, the better, especially when shooting series of pictures in RAW. However, it will only have influence on the buffer and how fast it is cleared.

Your suggested card has a write speed of up to 60 MegaByte - but "up to" can mean anything in between 0.1 and 60.0 MB/s. Look for benchmarks - or look for Speed Classes - those will usually tell you the minimum continuous write speed of a card. Speed-classes come in all sorts of logos and are usually displayed on the card.

Please note that the camera has to support the protocol of the card - A U3 card will only be able to work at C6-speed (at best) in a camera that only supports up to C6.

Now, having a standard is all well and fine - as long as everyone is abiding by it. "Premium" card manufacturers have a reputation to lose, so they usually will not forge speed ratings. If you do not know if you want to trust them, again, you should look for benchmarks and reviews.


Are µSDs more reliable than regular SDs?

No. I carry some of my (non-essential) SD cards in my purse - next to my coins and without protective cases. So I assume that to break an SD-card, you really have to try. SD-cards are usually cheaper than µSD-cards (at same specifications), so I would go with one of these all the time.

This, of course, does not consider cross-device use of the card, e.g. in a smartphone.


Are Samsung's cards reliable?

Simply look for reviews in the internet (e.g. in the link you posted from Amazon). I have no experience with Samsung, though they tend to have good reputation. Their SSDs are always well-received, so I would think the same would go for their SD-cards. However, there is always the possibility that you get the one bad card of a batch - or that one specific model comes out faulty.

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  • Thanks for the great answer. I'd upvote but I don't have the required rep. I will come back when I do. The cards is class 10 and is U3 compatible. From what I've read class 10 means a write at a minimum of 10MB/s and the U3 compatibility corresponds to a minimum of 30MB/s. So hopefully I'd always be close to the 13MB/s as you suggested? – 1QuickQuestion Jan 3 '18 at 13:09
  • Agreed. I would love to see some speeds tests for this card. I can only find reviews for the 128GB versions. Samsung have also been confusing (in my naive opinion) by using "+" for their old cards and "plus" for the new cards. – 1QuickQuestion Jan 3 '18 at 13:16
  • (included the answer to your first comment into my answer). Well...if you don't like their naming scheme, you can always look for cards of other manufacturers (Kingston, Transcend, Sandisk, Lexar, Sony, Toshiba - just to name a few). – flolilo Jan 3 '18 at 13:20
  • Just to say that the first card I received only managed an average write speed of 5.5MB/s. I immediately returned this and the replacement averaged around 60MB/s. Just shows that you have to check! – 1QuickQuestion Jan 9 '18 at 11:06

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