我想重置 Windows，以便清理它。但在执行此操作时我的笔记本电脑崩溃了。
此时我的笔记本电脑上根本没有操作系统。所以我尝试安装 Ubuntu 20.04。但由于某种原因，这没有奏效。更具体地说，我的磁盘上似乎只有 1GB 的空间。即使如此，整个磁盘都是空的。
我该怎么做才能访问丢失的空间？
当我尝试选择擦除磁盘并安装 ubuntu 时，出现错误，提示我没有足够的可用空间。如果我尝试自行分区，则只有大约 1gb 的空间可用。（我还运行了 ubuntu 的试用版以尝试访问分区，但即使这样，我也没有找到显示剩余磁盘空间的方法。
谢谢你的帮助
编辑
根据要求，我运行 sudo fdisk -l 命令并得到以下输出
ubuntu@ubuntu:~$ sudo fdisk -l
Disk /dev/loop0: 1.98 GiB, 2103640064 bytes, 4108672 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: 29.9 MiB, 31334400 bytes, 61200 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: 54.98 MiB, 57626624 bytes, 112552 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: 255.58 MiB, 267980800 bytes, 523400 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: 62.9 MiB, 65105920 bytes, 127160 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: 49.8 MiB, 52203520 bytes, 101960 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/nvme0n1: 1023.102 MiB, 1073741312 bytes, 2097151 sectors
Disk model: SM2260
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: 14.96 GiB, 16043212800 bytes, 31334400 sectors
Disk model: Flash Disk
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: 0x13426527
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 31334399 31332352 15G c W95 FAT32 (LBA)
ubuntu@ubuntu:~$ sudo lsblk /dev/nvme0n1
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 1024M 0 disk