Are SN64G and SH64G both genuine High Endurance cards?

Memory Cards SD | microSD | CFast | CFexpress | CompactFlash
1

Hi,

I recently purchased a 2-pack of SanDisk High Endurance 64GB microSD cards. Both cards have identical packaging labeled “High Endurance”, but after inspecting them more carefully, I noticed several differences.

First, physically, the two cards look different on their back side — one is black and the other is dark green, which already suggests they may not be the same product.

Second, after inspecting them on Linux, they report different internal names:

  • Card 1: MMC_NAME=SN64G (manufactured 02/2022)
  • Card 2: MMC_NAME=SH64G (manufactured 10/2023)

Both cards show manfid=0x000003 and oemid=0x5344, so they appear to be genuine SanDisk products.

However, I also noticed a difference in their block count:

  • SN64G: 0x00200000 blocks
  • SH64G: 0x00300000 blocks

The SH64G appears to have more reserved space internally, which I would expect from a High Endurance card (for wear leveling and bad block replacement). The SN64G does not seem to have this.

My question: is SN64G a genuine High Endurance card, or is it a standard SanDisk card? The naming convention suggests SH = "S"an"H"disk High Endurance and SN = standard, but I’m not 100% sure.

Can anyone from SanDisk or the community confirm whether both references are indeed High Endurance cards?

Thanks in advance.

20260521154710
202605211547101920×2560 339 KB

20260521154720
202605211547201920×2560 489 KB

2

Have you checked our knowledge base articles?
(Get Support for Your SSDs and Flash Products | Sandisk)

Try this one.

Have you opened a Support Case?
If not, contact Sandisk Technical Support for assistance.
(Contact Support | Sandisk)