Re: Media writer/USB Flash -

["George N. White III" <gnwiii@xxxxxxxxx>]

On Sun, 7 Jun 2020 at 04:00, Samuel Sieb <samuel@xxxxxxxx> wrote:

FAT32 is the usual portable filesystem.

FAT32 is the current usual but "future has been" portable

filesystem.    FAT32 doesn't allocate partial blocks, so a

direct copy of some linux directory often results in a very

large loss of free space on FAT32.  FAT32 limits you to

files under 4GB, and partitions under 32GB.   You can

create a FAT32 filesystem with smaller allocation units,

but that probably reduces the partition size limit and

many not be supported on some devices.

When moving files between linux and other systems I generally use

archives to preserve ownership and permissions, while avoiding

small file allocation problems.    The way forward is exFAT:

https://fossbytes.com/linux-5-7-microsofts-exfat-driver-code/

TL;DNR:

exFAT is a patented Microsoft filesystem that is widely used for

with removable storage on portable devices.   Microsoft released

a snapshop of the code under GPL2 in 2019.

exFAT has total filesystem size and file size limits far beyond what 

most users require, and has been supported on Windows and macOS

for years.  Support for exFAT was added to the linux 5.4 kernel and 

Samsung (which has exFAT for androids device) has contributed

improvements that were accepted for 5.7.

Fedora 31 and 32 don't have exFAT in the kernel:

% grep EXFAT /boot/config-`uname -r`

# CONFIG_STAGING_EXFAT_FS is not set

For now, there is a FUSE implementation in Fedora:

    % sudo dnf install exfat-utils fuse-exfat

I generally format memory sticks/cards with Windows in

case fuse-exfat does something that other devices don't

handle.  There are many 3rd party implementations;

most are only tested against Windows.

--

George N. White III

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