我有一个相当新的 64GB 内存条，我用它来为 Ubuntu 和 Cloudready 等创建可启动媒体。我现在想“清空”它并恢复全部 64GB，但我遇到了问题。
我查看了几个线程，但没有找到任何有用的内容。
我认为使用格式或初始化可以释放一些空间，但事实并非如此。
输出sudo fdisk -l是......
Disk /dev/loop12: 310.8 MiB, 325902336 bytes, 636528 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
Disk /dev/sdb: 14.4 GiB, 15472047104 bytes, 30218842 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
我认为这/dev/loop12是 Cloudready 启动设置的剩余部分，这 /dev/sdb是在尝试将整个驱动器重置回单个分区时使用 Gparted 等的结果。
谁能提供必要的终端命令来擦除所有内容并将驱动器设置为 FAT32 或 NTFS 等？
附言：这是插入一个包含 Cloudready 的 32 千兆 USB 驱动器（而不是我遇到问题的驱动器）时产生的类似的终端输出。
这是硬盘 + 32GB 硬盘的输出
/* INTERNAL SDD
*/
$ sudo fdisk -l
[sudo] password for zoom:
Disk /dev/loop2: 4.9 MiB, 5152768 bytes, 10064 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
Disk /dev/loop3: 86.9 MiB, 91099136 bytes, 177928 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
Disk /dev/loop4: 371.7 MiB, 389734400 bytes, 761200 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
Disk /dev/sda: 223.6 GiB, 240057409536 bytes, 468862128 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: gpt
Disk identifier: A2DDEF5A-F5B3-4A4F-887F-443D015D386F
Device Start End Sectors Size Type
/dev/sda1 2048 923647 921600 450M Windows recovery environment
/dev/sda2 923648 1128447 204800 100M EFI System
/dev/sda3 1128448 1161215 32768 16M Microsoft reserved
/dev/sda4 1161216 288422327 287261112 137G Microsoft basic data
/dev/sda5 288423936 290449407 2025472 989M Windows recovery environment
/dev/sda6 290451456 452415487 161964032 77.2G Linux filesystem
/dev/sda7 452415488 468860927 16445440 7.9G Linux swap
/* REMOVABLE DRIVE
*/
Disk /dev/loop12: 310.8 MiB, 325902336 bytes, 636528 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
Disk /dev/sdb: 28.7 GiB, 30752000000 bytes, 60062500 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: gpt
Disk identifier: DE03DF63-300E-4548-B0BB-82F655FA0C3D
Device Start End Sectors Size Type
/dev/sdb1 64 64 1 512B ChromeOS reserved
/dev/sdb2 65 65 1 512B ChromeOS reserved
/dev/sdb3 66 66 1 512B ChromeOS reserved
/dev/sdb4 67 67 1 512B ChromeOS reserved
/dev/sdb5 68 68 1 512B ChromeOS reserved
/dev/sdb6 69 69 1 512B ChromeOS reserved
/dev/sdb7 70 70 1 512B ChromeOS reserved
/dev/sdb8 71 71 1 512B ChromeOS reserved
/dev/sdb9 72 72 1 512B ChromeOS reserved
/dev/sdb10 73 73 1 512B ChromeOS reserved
/dev/sdb11 74 74 1 512B ChromeOS reserved
/dev/sdb12 75 75 1 512B ChromeOS reserved
/dev/sdb13 76 76 1 512B ChromeOS reserved
/dev/sdb14 77 77 1 512B ChromeOS reserved
/dev/sdb15 78 78 1 512B ChromeOS reserved
/dev/sdb16 8626242 13164609 4538368 2.2G Microsoft basic data
/dev/sdb17 20546 53313 32768 16M ChromeOS kernel
/dev/sdb18 2383938 8626241 6242304 3G ChromeOS root fs
/dev/sdb19 53314 86081 32768 16M ChromeOS kernel
/dev/sdb20 2379842 2383937 4096 2M ChromeOS root fs
/dev/sdb21 16514 16514 1 512B ChromeOS kernel
/dev/sdb22 16515 16515 1 512B ChromeOS root fs
/dev/sdb23 86082 2183233 2097152 1G Microsoft basic data
/dev/sdb24 16516 16516 1 512B ChromeOS reserved
/dev/sdb25 16517 16517 1 512B ChromeOS reserved
/dev/sdb26 130 16513 16384 8M unknown
/dev/sdb27 2314306 2379841 65536 32M EFI System
Partition table entries are not in disk order.