MAUI android实现U盘文件的读写问题

使用MAUI开发安卓App，能够实现读取U盘的文本文件，但是不能向U盘写入，提示'Access to the path '/storage/6EB835AAB83571A7/123.txt' is denied.'，下面是一些代码片段，哪位朋友用过的，给点提示
已经开启的权限

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <application android:allowBackup="true" android:icon="@mipmap/appicon" android:supportsRtl="true"
               android:requestLegacyExternalStorage="true"
               ></application>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
    <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
    <uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />
    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.MANAGE_MEDIA" />
    <uses-permission android:name="android.permission.ACCESS_MEDIA_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
    <uses-permission android:name="android.permission.BIND_DEVICE_ADMIN" />
    <uses-permission android:name="android.permission.BIND_MIDI_DEVICE_SERVICE" />
    <uses-permission android:name="android.permission.MEDIA_CONTENT_CONTROL" />
    <uses-permission android:name="android.permission.READ_INPUT_STATE" />
  <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
    <uses-sdk android:minSdkVersion="21" />
</manifest>

读取和写入文本文件的代码

private async Task ReadUsb()
        {
            //6EB835AAB83571A7这是U盘名称
            string s1 = Environment.CurrentDirectory + "storage/6EB835AAB83571A7/123.txt";
            var status = await Permissions.RequestAsync<Permissions.StorageRead>();
            if (status != PermissionStatus.Granted)// && status1 != PermissionStatus.Granted)
            {
                return;
            }
            ReceiveText = File.ReadAllText(s1);
        }
private async Task WriteUsb()
        {
            string s1 = Environment.CurrentDirectory + "storage/6EB835AAB83571A7/123.txt";
            var status = await Permissions.RequestAsync<Permissions.StorageWrite>();
            if (status != PermissionStatus.Granted)// && status1 != PermissionStatus.Granted)
            {
                return;
            }
            File.WriteAllText(s1, "cdcd", System.Text.Encoding.UTF8);
        }

【以下回答由 GPT 生成】

我很抱歉，但您并没有提出具体的问题。请说明您需要解决什么问题，我将尽力给出解决方案。

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android.permission.WRITE_MEDIA_STORAGE

加这个权限吧