Add again manual setting TF/USB instructions

README.cn.md

@@ -30,6 +30,43 @@
 armbian-install
 ```
 
+
+<details>
+  <summary>或者手动分配剩余空间 </summary>
+
+#### 查看 [操作截图](https://user-images.githubusercontent.com/68696949/137860992-fbd4e2fa-e90c-4bbb-8985-7f5db9f49927.jpg)
+
+```yaml
+# 1. 根据空间大小确认 TF/USB 的名称，TF卡为 [ mmcblk ]，USB 为[ sd ]
+在命令行中: 输入 [ fdisk -l | grep "sd" ] 查看卡的名称
+# 2. 获取剩余空间的起始值，复制并保存，下面使用（例如：5382144）
+在命令行中: 输入 [ fdisk -l | grep "sd" | sed -n '$p' | awk '{print $3}' | xargs -i expr {} + 1 ] 得到剩余空间起始值
+# 3. 开始分配未使用的空间（例如：sda、mmcblk0 或 mmcblk1）
+在命令行中: 输入 [ fdisk /dev/sda ] 开始分配剩余空间
+在命令行中: 输入 [ n ] 创建新分区
+在命令行中: 输入 [ p ] 指定分区类型为主分区
+在命令行中: 将分区号设置为 [ 3 ]
+在命令行中: 分区的起始值，输入第二步得到的值 [ 5382144 ]
+在命令行中: 分区的结束值，按 [ 回车 ] 使用默认值
+在命令行中: 如果提示是否删除签名？[Y]es/[N]o: 输入 [ Y ]
+在命令行中: 输入 [ t ] 指定分区类型
+在命令行中: 输入分区编号 [ 3 ]
+在命令行中: 指定分区类型为 Linux，输入代码 [ 83 ]
+在命令行中: 输入 [ w ] 保存结果
+在命令行中: 输入 [ reboot ] 重启
+# 4. 重新启动后，格式化新分区
+在命令行中: 输入 [ mkfs.ext4 -F -L SHARED /dev/sda3 ] 格式新分区
+# 5. 为新分区设置挂载目录
+在命令行中: 输入 [ mkdir -p /mnt/share ] 创建新分区的挂载目录
+在命令行中: 输入 [ mount -t ext4 /dev/sda3 /mnt/share ] 进行挂载
+# 6. 添加开机自动挂载
+在命令行中: [ vi /etc/fstab ]
+# 按 [ i ] 进入编译模式，将下面的代码复制，黏贴到文件的末尾处
+/dev/sda3 /mnt/share ext4 defaults 0 0
+# 按 [ esc ] 键退出，输入 [ :wq! ] 后按 [ 回车 ] 保存退出，结束设置。
+```
+</details>
+
 - ### 更新 Armbian 内核
 
 查询 [可选内核](https://github.com/ophub/flippy-kernel/tree/main/library) 版本，登录 Armbian 系统 → 输入命令：

README.md

@@ -63,6 +63,42 @@ Login in to armbian → input command:
 armbian-tf
 ```
 
+<details>
+  <summary>Or manually allocate the remaining space</summary>
+
+#### View [Operation screenshot](https://user-images.githubusercontent.com/68696949/137860992-fbd4e2fa-e90c-4bbb-8985-7f5db9f49927.jpg)
+
+```yaml
+# 1. Confirm the name of the TF/USB according to the size of the space. The TF is [ `mmcblk` ], USB is [ `sd` ]
+Command: Enter [ fdisk -l | grep "sd" ]
+# 2. Get the starting value of the remaining space, Copy and save, used below  (E.g: 5382144)
+Command: Enter [ fdisk -l | grep "sd" | sed -n '$p' | awk '{print $3}' | xargs -i expr {} + 1 ]
+# 3. Start allocating unused space (E.g: sda, mmcblk0 or mmcblk1)
+Command: Enter [ fdisk /dev/sda ] Start allocating the remaining space
+Command: Select [ n ] to create a partition
+Command: Select [ p ] to specify the partition type as primary partition
+Command: Set the partition number to [ 3 ]
+Command: The start value of the partition, enter the value obtained in the second step, E.g: [ 5382144 ]
+Command: End value, press [ Enter ] to use the default value
+Command: If there is a hint: Do you want to remove the signature? [Y]es/[N]o: Enter [ Y ]
+Command: Enter [ t ] to specify the partition type
+Command: Enter Partition number [ 3 ]
+Command: Enter Hex code (type L to list all codes): [ 83 ]
+Command: Enter [ w ] to save
+Command: Enter [ reboot ] to restart
+# 4. After restarting, format the new partition
+Command: Enter [ mkfs.ext4 -F -L SHARED /dev/sda3 ] to format the new partition
+# 5. Set the mount directory for the new partition
+Command: Enter [ mkdir -p /mnt/share ] to Create mount directory
+Command: Enter [ mount -t ext4 /dev/sda3 /mnt/share ] to Mount the newly created partition to the directory
+# 6. Add automatic mount at boot
+Command: Enter [ vi /etc/fstab ]
+# Press [ i ] to enter the input mode, copy the following values to the end of the file
+/dev/sda3 /mnt/share ext4 defaults 0 0
+# Press [ esc ] to exit, Input [ :wq! ] and [ Enter ] to Save, Finish.
+```
+</details>
+
 ## Armbian firmware make method
 
 - Different amlogic armbian firmware, use the corresponding soc code to generate. Please choose according to your box soc model. Supported soc are `s922x`, `s922x-n2`, `s905x3`, `s905x2`, `s912`, `s905d`, `s905x`, `s905w`. Note: `s922x-n2` is `s922x-odroid-n2`.