我尝试访问 HAMA Classic USB 3.0 闪存驱动器上的重要文件，但无济于事。昨天工作正常，但现在似乎无法正确识别。
驱动器位于 lsusb 中（此行仅在驱动器插入时可见）：
Bus 002 Device 009: ID 058f:6387 Alcor Micro Corp. Flash Drive
但是 sudo fdisk -l 无法识别它，只有：
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 1241874431 1241872384 592.2G 83 Linux
/dev/sda2 1241876478 1250263039 8386562 4G 5 Extended
/dev/sda5 1241876480 1250263039 8386560 4G 82 Linux swap / Solaris
lsblk 的输出：
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 140.7M 1 loop /snap/gnome-3-26-1604/98
loop1 7:1 0 24.7M 1 loop /snap/snapd/6434
loop2 7:2 0 3.7M 1 loop /snap/gnome-system-monitor/135
loop3 7:3 0 4.3M 1 loop /snap/gnome-calculator/704
loop4 7:4 0 956K 1 loop /snap/gnome-logs/93
loop5 7:5 0 93.8M 1 loop /snap/core/8935
loop6 7:6 0 160.2M 1 loop /snap/gnome-3-28-1804/116
loop7 7:7 0 14.8M 1 loop /snap/gnome-characters/495
loop8 7:8 0 91.4M 1 loop /snap/core/8689
loop9 7:9 0 48.3M 1 loop /snap/gtk-common-themes/1474
loop10 7:10 0 55M 1 loop /snap/core18/1705
loop11 7:11 0 27M 1 loop /snap/snapd/6953
loop12 7:12 0 54.8M 1 loop /snap/gtk-common-themes/1502
loop13 7:13 0 83.9M 1 loop /snap/drawio/20
loop14 7:14 0 84.2M 1 loop /snap/drawio/21
sda 8:0 0 596.2G 0 disk
├─sda1 8:1 0 592.2G 0 part /
└─sda5 8:5 0 4G 0 part [SWAP]
sr0 11:0 1 1024M 0 rom
这些是我通过 dmesg 得到的信息：
[ 1311.475152] usb 2-2: new high-speed USB device number 8 using ehci-pci
[ 1312.245074] usb 2-2: New USB device found, idVendor=058f, idProduct=6387
[ 1312.245083] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1312.245087] usb 2-2: Product: Hama
[ 1312.245091] usb 2-2: Manufacturer: Alcor
[ 1312.245094] usb 2-2: SerialNumber: 44EE41FB
[ 1312.246145] usb-storage 2-2:1.0: USB Mass Storage device detected
[ 1312.250183] scsi host7: usb-storage 2-2:1.0
[ 1334.144130] usb 2-2: reset high-speed USB device number 8 using ehci-pci
我还在 Windows 计算机中尝试过 USB 驱动器，也遇到了类似的问题 - 有声音表明它已被识别，但我无法访问文件。如果有人能给我任何关于如何恢复文件的想法，我将不胜感激。
须藤fdisk -l：
sudo fdisk -l
Disk /dev/loop0: 140.7 MiB, 147501056 bytes, 288088 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/loop1: 24.7 MiB, 25915392 bytes, 50616 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/loop2: 3.7 MiB, 3862528 bytes, 7544 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: 4.3 MiB, 4464640 bytes, 8720 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: 956 KiB, 978944 bytes, 1912 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/loop5: 93.8 MiB, 98336768 bytes, 192064 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/loop6: 160.2 MiB, 167931904 bytes, 327992 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/loop7: 14.8 MiB, 15466496 bytes, 30208 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: 596.2 GiB, 640135028736 bytes, 1250263728 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: 0x6ce5e98e
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 1241874431 1241872384 592.2G 83 Linux
/dev/sda2 1241876478 1250263039 8386562 4G 5 Extended
/dev/sda5 1241876480 1250263039 8386560 4G 82 Linux swap / Solaris
Disk /dev/loop8: 91.4 MiB, 95805440 bytes, 187120 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/loop9: 48.3 MiB, 50642944 bytes, 98912 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/loop10: 55 MiB, 57614336 bytes, 112528 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/loop11: 27 MiB, 28356608 bytes, 55384 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/loop12: 54.8 MiB, 57479168 bytes, 112264 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/loop13: 83.9 MiB, 87916544 bytes, 171712 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/loop14: 84.2 MiB, 88244224 bytes, 172352 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
ls -Alh /dev/sda*：
brw-rw---- 1 root disk 8, 0 Apr 18 21:26 /dev/sda
brw-rw---- 1 root disk 8, 1 Apr 18 21:26 /dev/sda1
brw-rw---- 1 root disk 8, 2 Apr 18 21:26 /dev/sda2
brw-rw---- 1 root disk 8, 5 Apr 18 21:26 /dev/sda5