Yet Another Cycling Forum

General Category => The Knowledge => Ctrl-Alt-Del => Topic started by: Cudzoziemiec on 03 July, 2018, 01:04:24 pm

Title: Micro SD HC > Micro SD
Post by: Cudzoziemiec on 03 July, 2018, 01:04:24 pm
I bought a Micro SD card for my son's phone but on closer inspection it turns out to be actually a Micro SD HC. The symbols on the packaging seem to indicate that this will fit a Micro SD HC or Micro SD XC slot but not a "classic" Micro SD. Prising his phone apart, the relevant receptacle is simply labelled "Micro SD". Will it fit? Have I misread the somewhat hieroglyphic icons?
Title: Re: Micro SD HC > Micro SD
Post by: Ham on 03 July, 2018, 01:17:16 pm
Should do, yes, the HC/XC is all about how many squiggly things you can stuff on it. NOT a MINI SD.

ETA - it's unlikely the phone will not cope with an HC card, might not with an XC.
Title: Re: Micro SD HC > Micro SD
Post by: Cudzoziemiec on 03 July, 2018, 01:19:09 pm
So the HC card should be compatible with the non-HC slot? I'm not sure what "squiggly things" you mean.
Title: Re: Micro SD HC > Micro SD
Post by: Ham on 03 July, 2018, 01:20:41 pm
bits and bytes.

Standard - up to 4Gb, HC, 4 - 32, XC > 32 Gb

ETA Check on the phone manual but it is unlikely not to support HC. Not impossible. All the same physical size.
Title: Re: Micro SD HC > Micro SD
Post by: Cudzoziemiec on 03 July, 2018, 01:23:51 pm
Cheers.  :thumbsup:
Title: Re: Micro SD HC > Micro SD
Post by: andrew_s on 03 July, 2018, 03:26:24 pm
bits and bytes.

Standard - up to 4Gb, HC, 4 - 32, XC > 32 Gb

ETA Check on the phone manual but it is unlikely not to support HC. Not impossible. All the same physical size.
according to the latest specs (https://www.dpreview.com/news/7847794311/sd-express-sduc-memory-cards-association), it continues...

XC: 32 Gb - 2TB
UC: 2TB - 128 TB

My memory agreed with the graphic, that the limit on SD standard was 2 GB. Having said that, many SD or SDHC devices will cope with larger cards, though probably not up to the limit of the next category up.

It will take when, and if, they are actually available, 3 days at 985 MB/s to read out a 128 TB card.
Title: Re: Micro SD HC > Micro SD
Post by: Cudzoziemiec on 03 July, 2018, 05:06:17 pm
It all works fine.  :thumbsup:
Title: Re: Micro SD HC > Micro SD
Post by: frankly frankie on 04 July, 2018, 12:15:38 pm
The (expensive) higher-speed variants appear to have a different 'pins' layout.  eg SD XCII etc.

(https://1.img-dpreview.com/files/p/E~TS590x0~articles/7847794311/bus_speed_img.jpeg)
Title: Re: Micro SD HC > Micro SD
Post by: fuaran on 04 July, 2018, 12:39:14 pm
Yes, UHS-II or UHS-III has an extra row of pins. Though it should still be backwards compatible. ie the extra pins are ignored, it just works at a lower speed.