Today's Amazon Gold Box daily deal is all about Lexar memory, and in not-so-modest sizes and speeds. Nope, these are not your bottom of the barrel memory cards and flash drives on offer. Those most relevant to your phone needs, the microSD cards, boast UHS-I/U3 speeds, meaning they meet the second-most rigorous speed specification in the industry. The deals are good too, matching the lowest price Amazon has ever offered for them.

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You'll see 32, 64, and 128 gigabyte variants of the microSD and the larger two sizes for the SD card. The microSD cards are, as previously mentioned, rated for 95MB/s read speeds in accordance with the UHS-I specification. The SD cards are the only step up from that, UHS-II, with the ability to read at 150MB/s. Both should be suitable for recording and viewing 4K video.

According to CamelCamelCamel, these are all at or below all-time low prices. The 128GB microSD card, priced today at $87.99, is far cheaper than its previous best price of $104.99. For both storage variants of the SD card, they are more than $20 below their previous low prices.

As Gold Box deals, they will be gone either by the end of the day or when Amazon runs out of stock, whichever comes first. Don't forget to check out the USB 3.0 Lexar JumpDrives and Crucial SSDs that are part of today's deal, as well.