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microSD card size?

Posted: Fri Aug 09, 2019 2:38 pm
by oldplum
I would like to order a Raspberry Pi 4 model B+ with 4GB Ram but the largest microSD card is only 16GB. Could i buy a larger microSD card about 128GB or even 256GB?

Re: microSD card size?

Posted: Fri Aug 09, 2019 2:49 pm
by jahboater
oldplum wrote:
Fri Aug 09, 2019 2:38 pm
I would like to order a Raspberry Pi 4 model B+ with 4GB Ram but the largest microSD card is only 16GB. Could i buy a larger microSD card about 128GB or even 256GB?
Who says the largest microSD card is only 16GB?
I use 64GB or 128GB cards only, now that they are cheap (Sandisk A1)
I know of no problem with 256GB, but never personally tried one.
The file system on Raspbian Linux can handle any size.

The Pi4B+ has not been released yet.

Re: microSD card size?

Posted: Fri Aug 09, 2019 2:50 pm
by pcmanbob
Simple answer YES

But do you really need all that space on the SD card, 32 or 64GB SD card would leave you plenty of space even if you installed raspbian buster with desktop and recommended software.

if you do decide to buy a 128GB or even 256GB SD card I would recommend buying them from a local shop rather than an online sales side many of the larger size SD cards sold on line are fakes.

Re: microSD card size?

Posted: Fri Aug 09, 2019 2:56 pm
by Andyroo
SD cards come now unto 1Tb (do not look at the cost unless you are sat down).

A couple of points to note about larger cards:

1) If you are using larger cards for NOOBS or from Windows, you need a special formatting program (no idea what it is though - Mac user)
2) The initial boot can be much longer as the Pi automatically resizes the partitions to use the extra space

I've maxed out at 16Gb and any bigger than that I go to a HDD or SSD connected via USB as 16Gb is plenty for the operating system and programs with enough spare to cope with levelling issues long term. Data normally is small or lives on the HDD or other network storage.

I only use Samsung or San Disk. The San Disk A1 Ultra have become my goto cards.

Re: microSD card size?

Posted: Fri Aug 09, 2019 2:58 pm
by klricks
oldplum wrote:
Fri Aug 09, 2019 2:38 pm
I would like to order a Raspberry Pi 4 model B+ with 4GB Ram but the largest microSD card is only 16GB. Could i buy a larger microSD card about 128GB or even 256GB?
16GB will have plenty of space for most users. Use a larger card if you plan on storing a lot of media files or if installing more than 1 OS on the card.

Re: microSD card size?

Posted: Fri Aug 09, 2019 4:58 pm
by W. H. Heydt
klricks wrote:
Fri Aug 09, 2019 2:58 pm
oldplum wrote:
Fri Aug 09, 2019 2:38 pm
I would like to order a Raspberry Pi 4 model B+ with 4GB Ram but the largest microSD card is only 16GB. Could i buy a larger microSD card about 128GB or even 256GB?
16GB will have plenty of space for most users. Use a larger card if you plan on storing a lot of media files or if installing more than 1 OS on the card.
Or use a 16GB card and then put large files on a USB stick or SSD, or even a NAS box.

Re: microSD card size?

Posted: Fri Aug 09, 2019 11:28 pm
by nmrider66
I also am thinking about a 128 GB or 256 GB micro SD card for a Pi4 when I have money for the project. I want space for about 90 GB of mp3 music and space for some video files and would rather not have another storage device hanging off of the Pi.

My local Walmart is selling 128 GB and 256 GB for about $20 and $40.

Think I remember reading that if DD is used to place an image on the card there is a size limit. If etcher is used that limit is eliminated.

Is my memory working?

Re: microSD card size?

Posted: Fri Aug 09, 2019 11:53 pm
by drgeoff
nmrider66 wrote:
Fri Aug 09, 2019 11:28 pm
Think I remember reading that if DD is used to place an image on the card there is a size limit. If etcher is used that limit is eliminated.

Is my memory working?
About that, at least, your memory is not working.

Re: microSD card size?

Posted: Sat Aug 10, 2019 12:12 am
by W. H. Heydt
nmrider66 wrote:
Fri Aug 09, 2019 11:28 pm
Think I remember reading that if DD is used to place an image on the card there is a size limit. If etcher is used that limit is eliminated.
The problem is if you try to *copy* NOOBS with a Windows or Mac system without first reformatting any SD card larger than 32GB. Larger cards are formatted in exFAT format, which the boot ROM can't read. dd doesn't have that problem because it just doesn't care. It does a direct write, sector by sector regardless of what may have existed there before.

Frankly, if I wanted to hold 90GB of data, I'd use either an SSD or an HDD. With an SD card, at the very least I'd want a minimum of two backups on some other medium. The risk of a corrupted SD card that makes the data inaccessible is higher than I'd care for in that situation.

Re: microSD card size?

Posted: Sat Aug 10, 2019 12:29 am
by nmrider66
Thanks @W. H. Heydt. Then I can use my Pi3B+ to prep an SD card with dd. I won't need a computer with an Intel or AMD processor and etcher.

My music files are stored on 4 devices already but would not mind making a copy of the SD anyway.

Re: microSD card size?

Posted: Sat Aug 10, 2019 8:51 am
by drgeoff
W. H. Heydt wrote:
Sat Aug 10, 2019 12:12 am
nmrider66 wrote:
Fri Aug 09, 2019 11:28 pm
Think I remember reading that if DD is used to place an image on the card there is a size limit. If etcher is used that limit is eliminated.
The problem is if you try to *copy* NOOBS with a Windows or Mac system without first reformatting any SD card larger than 32GB. Larger cards are formatted in exFAT format, which the boot ROM can't read. dd doesn't have that problem because it just doesn't care. It does a direct write, sector by sector regardless of what may have existed there before.
The distinction is between putting NOOBS or an image on the card. Neither dd nor Etcher does the former. Either will do the latter and have no size restriction. What nmrider66 thought he remembered reading - "If DD is used to place an image on the card there is a size limit. If etcher is used that limit is eliminated." - is not the case.

Re: microSD card size?

Posted: Sat Aug 10, 2019 12:45 pm
by oldplum
Many thanks for all the kind replies everyone.

Re: microSD card size?

Posted: Sat Aug 10, 2019 1:29 pm
by Fars
Hi, I’m waiting for my Raspberry Pi4 4Go, I m a newbie...
My question, is it possible to install Buster on formated exfat sd 16gb or more? Fat is limited with files size. I prefer exfat.
Is it possible?

Re: microSD card size?

Posted: Sat Aug 10, 2019 1:32 pm
by mahjongg
No A PI doesn't boot from exfat.
Also, it only needs FAT to boot, Raspbian uses its own filing system.
if you use Etcher to create a Rasbian boot SD-card, then it doesn't matter if and how you formatted it, it will overwrite everything with new information.

Re: microSD card size?

Posted: Sat Aug 10, 2019 2:13 pm
by drgeoff
Fars wrote:
Sat Aug 10, 2019 1:29 pm
Hi, I’m waiting for my Raspberry Pi4 4Go, I m a newbie...
My question, is it possible to install Buster on formated exfat sd 16gb or more? Fat is limited with files size. I prefer exfat.
Is it possible?
Only a small partition (about 250 Mbyte) on the card will be FAT and Linux will not normally store your user files there. The remainder of the card will be a Linux file system which can store files of size larger than any SD card you can buy today.

Re: microSD card size?

Posted: Tue Aug 13, 2019 3:08 pm
by Fars
Thanks for your answer! I will use Etcher!
I thought that Fat was limited to 3 ou 4 GB for save one file.

Re: microSD card size?

Posted: Tue Aug 13, 2019 3:47 pm
by B.Goode
Fars wrote:
Tue Aug 13, 2019 3:08 pm
Thanks for your answer! I will use Etcher!
I thought that Fat was limited to 3 ou 4 GB for save one file.

Correct. A single file size limit of 4G bytes.

But this is irrelevant in the context of using a microSD card to boot the Raspbian Operating System. The reply from @DrGeoff looks succinct and accurate to me:
Only a small partition (about 250 Mbyte) on the card will be FAT and Linux will not normally store your user files there. The remainder of the card will be a Linux file system which can store files of size larger than any SD card you can buy today.

Re: microSD card size?

Posted: Sun Aug 18, 2019 10:37 am
by jahboater
B.Goode wrote:
Tue Aug 13, 2019 3:47 pm
card to boot the Raspbian Operating System. The reply from @DrGeoff looks succinct and accurate to me:
Only a small partition (about 250 Mbyte) on the card will be FAT and Linux will not normally store your user files there. The remainder of the card will be a Linux file system which can store files of size larger than any SD card you can buy today.
For amusement, the Linux filesystem (ext4) can handle files up to 16TiB and file-systems up to 1 EiB.