I have burned OS image (.img) into a new SD card (Sandisk 16GB) use LibreELEC USB-SD creator tool on Ubuntu laptop. I assume I don't need to format SD card before writing. Then I tried browse SD card for files, but Ubuntu not able to show the contents of sd card. It only show space available on SD card.
I tried also to browse SD card on Windows PC, but it don't recognized it, when click on SD card drive icon, Windows show alert that SD card first need be formatted. There is also listed volume 537 MB, it can't be opened, when try click to mount it, error message is displayed:
Unable to access "537 MB Volume"
Error mounting /dev/mmcblk0p1 at /media/venitek/3463-3434: Command line 'mount -t "vfat" -o "uhelper=udisks2,nodev,nosuid,uid=1000,shortname=mixed,utf8=1,showexec,flush"
"/dev/mmcblk0p1" "/media/venitek/3463-3434"' exitedd with non-zero exit status 32: mount: /dev/mmcblk0p1: can't read superblock
Edit: here is output fdisk -l command:
$ sudo fdisk -l
Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xb45e11b8
Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 718847 716800 350M de Dell Utility
/dev/sda2 718848 7010303 6291456 3G c W95 FAT32 (LBA)
/dev/sda3 * 7010304 960389119 953378816 454.6G 83 Linux
/dev/sda4 960391166 976771071 16379906 7.8G 5 Extended
/dev/sda5 960391168 976771071 16379904 7.8G 82 Linux swap / Solaris
Partition 4 does not start on physical sector boundary.
Disk /dev/mmcblk0: 14.9 GiB, 15931539456 bytes, 31116288 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xbe03dce7
Device Boot Start End Sectors Size Id Type
/dev/mmcblk0p1 * 8192 1056767 1048576 512M c W95 FAT32 (LBA)
/dev/mmcblk0p2 1056768 1122303 65536 32M 83 Linux
I tried also commmand dd if=/dev/sdb1 bs=1024k count=10 | less, it show just vertical list of tilde ~ chars, not sure if it's readable.
Best Answer
The ability to write .img or .iso files is built into Ubuntu, don't use some weird third party tools. Either just double-click on the .img file in Nautilus (the file browser), or right-click on it and then select to pass it to the image writer. Select your SD card as target and choose to "recover" the image.
If your Windows can read the resulting USB or not depends on the file system that is written to the card.