diff --git a/src/fs/udf.cpp b/src/fs/udf.cpp
index a33ae44..f34c5f3 100644
--- a/src/fs/udf.cpp
+++ b/src/fs/udf.cpp
@@ -30,9 +30,12 @@
 
 namespace FS
 {
-constexpr qint64 MIN_UDF_BLOCKS = 282;
+constexpr qint64 MIN_UDF_BLOCKS = 300;
 constexpr qint64 MAX_UDF_BLOCKS = ((1ULL << 32) - 1);
 
+FileSystem::CommandSupportType udf::m_GetUsed = FileSystem::cmdSupportNone;
+FileSystem::CommandSupportType udf::m_SetLabel = FileSystem::cmdSupportNone;
+FileSystem::CommandSupportType udf::m_UpdateUUID = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType udf::m_Create = FileSystem::cmdSupportNone;
 bool udf::oldMkudffsVersion = false;
 
@@ -43,6 +46,8 @@ udf::udf(qint64 firstsector, qint64 lastsector, qint64 sectorsused, const QStrin
 
 void udf::init()
 {
+    m_GetUsed = findExternal(QStringLiteral("udfinfo"), {}, 1) ? cmdSupportFileSystem : cmdSupportNone;
+    m_SetLabel = m_UpdateUUID = findExternal(QStringLiteral("udflabel"), {}, 1) ? cmdSupportFileSystem : cmdSupportNone;
     m_Create = findExternal(QStringLiteral("mkudffs"), {}, 1) ? cmdSupportFileSystem : cmdSupportNone;
 
     if (m_Create == cmdSupportFileSystem) {
@@ -54,7 +59,11 @@ void udf::init()
 
 bool udf::supportToolFound() const
 {
-    return m_Create != cmdSupportNone;
+    return
+        m_GetUsed != cmdSupportNone &&
+        m_SetLabel != cmdSupportNone &&
+        m_UpdateUUID != cmdSupportNone &&
+        m_Create != cmdSupportNone;
 }
 
 FileSystem::SupportTool udf::supportToolName() const
@@ -93,6 +102,36 @@ QValidator* udf::labelValidator(QObject *parent) const
     return m_LabelValidator;
 }
 
+qint64 udf::readUsedCapacity(const QString& deviceNode) const
+{
+    ExternalCommand cmd(QStringLiteral("udfinfo"), { QStringLiteral("--utf8"), deviceNode });
+    if (!cmd.run(-1) || cmd.exitCode() != 0)
+        return -1;
+
+    QRegularExpressionMatch reBlockSize = QRegularExpression(QStringLiteral("^blocksize=([0-9]+)$"), QRegularExpression::MultilineOption).match(cmd.output());
+    QRegularExpressionMatch reUsedBlocks = QRegularExpression(QStringLiteral("^usedblocks=([0-9]+)$"), QRegularExpression::MultilineOption).match(cmd.output());
+
+    if (!reBlockSize.hasMatch() || !reUsedBlocks.hasMatch())
+        return -1;
+
+    qint64 blockSize = reBlockSize.captured(1).toLongLong();
+    qint64 usedBlocks = reUsedBlocks.captured(1).toLongLong();
+
+    return usedBlocks * blockSize;
+}
+
+bool udf::writeLabel(Report& report, const QString& deviceNode, const QString& newLabel)
+{
+    ExternalCommand cmd(report, QStringLiteral("udflabel"), { QStringLiteral("--utf8"), deviceNode, newLabel });
+    return cmd.run(-1) && cmd.exitCode() == 0;
+}
+
+bool udf::updateUUID(Report& report, const QString& deviceNode) const
+{
+    ExternalCommand cmd(report, QStringLiteral("udflabel"), { QStringLiteral("--utf8"), QStringLiteral("--uuid=random"), deviceNode });
+    return cmd.run(-1) && cmd.exitCode() == 0;
+}
+
 bool udf::create(Report& report, const QString& deviceNode)
 {
     return createWithLabel(report, deviceNode, QString());
diff --git a/src/fs/udf.h b/src/fs/udf.h
index bc2a5c9..f49df36 100644
--- a/src/fs/udf.h
+++ b/src/fs/udf.h
@@ -42,9 +42,15 @@ public:
 public:
     void init() override;
 
+    qint64 readUsedCapacity(const QString& deviceNode) const override;
     bool create(Report& report, const QString& deviceNode) override;
     bool createWithLabel(Report& report, const QString& deviceNode, const QString& label) override;
+    bool writeLabel(Report& report, const QString& deviceNode, const QString& newLabel) override;
+    bool updateUUID(Report& report, const QString& deviceNode) const override;
 
+    CommandSupportType supportGetUsed() const override {
+        return m_GetUsed;
+    }
     CommandSupportType supportGetLabel() const override {
         return cmdSupportCore;
     }
@@ -63,6 +69,12 @@ public:
     CommandSupportType supportBackup() const override {
         return cmdSupportCore;
     }
+    CommandSupportType supportSetLabel() const override {
+        return m_SetLabel;
+    }
+    CommandSupportType supportUpdateUUID() const override {
+        return m_UpdateUUID;
+    }
     CommandSupportType supportGetUUID() const override {
         return cmdSupportCore;
     }
@@ -75,6 +87,9 @@ public:
     bool supportToolFound() const override;
 
 public:
+    static CommandSupportType m_GetUsed;
+    static CommandSupportType m_SetLabel;
+    static CommandSupportType m_UpdateUUID;
     static CommandSupportType m_Create;
 
 private: