diff --git a/data/app.driftwood.Driftwood.gschema.xml b/data/app.driftwood.Driftwood.gschema.xml
index 9872109..379a2b4 100644
--- a/data/app.driftwood.Driftwood.gschema.xml
+++ b/data/app.driftwood.Driftwood.gschema.xml
@@ -124,5 +124,10 @@
       <summary>Security notification threshold</summary>
       <description>Minimum CVE severity for desktop notifications: critical, high, medium, or low.</description>
     </key>
+    <key name="watch-removable-media" type="b">
+      <default>false</default>
+      <summary>Watch removable media</summary>
+      <description>Scan removable drives for AppImages when mounted.</description>
+    </key>
   </schema>
 </schemalist>
diff --git a/src/core/database.rs b/src/core/database.rs
index 7d17d9c..73d2e17 100644
--- a/src/core/database.rs
+++ b/src/core/database.rs
@@ -1786,6 +1786,14 @@ impl Database {
         Ok(())
     }
 
+    pub fn set_portable(&self, id: i64, portable: bool, mount_point: Option<&str>) -> SqlResult<()> {
+        self.conn.execute(
+            "UPDATE appimages SET is_portable = ?2, mount_point = ?3 WHERE id = ?1",
+            params![id, portable as i32, mount_point],
+        )?;
+        Ok(())
+    }
+
     // --- Launch statistics ---
 
     pub fn get_top_launched(&self, limit: i32) -> SqlResult<Vec<(String, u64)>> {
diff --git a/src/core/mod.rs b/src/core/mod.rs
index 10e4554..56e97b3 100644
--- a/src/core/mod.rs
+++ b/src/core/mod.rs
@@ -11,6 +11,7 @@ pub mod integrator;
 pub mod launcher;
 pub mod notification;
 pub mod orphan;
+pub mod portable;
 pub mod report;
 pub mod security;
 pub mod updater;
diff --git a/src/core/portable.rs b/src/core/portable.rs
new file mode 100644
index 0000000..bbad943
--- /dev/null
+++ b/src/core/portable.rs
@@ -0,0 +1,71 @@
+use std::path::{Path, PathBuf};
+
+/// Information about a mounted removable device.
+#[derive(Debug, Clone)]
+pub struct MountInfo {
+    pub device: String,
+    pub mount_point: PathBuf,
+    pub fs_type: String,
+}
+
+/// Detect removable media mount points by parsing /proc/mounts.
+/// Looks for user-accessible removable paths with common removable fs types.
+pub fn detect_removable_mounts() -> Vec<MountInfo> {
+    let content = match std::fs::read_to_string("/proc/mounts") {
+        Ok(c) => c,
+        Err(_) => return Vec::new(),
+    };
+
+    let removable_prefixes = ["/media/", "/run/media/", "/mnt/"];
+    let removable_fs = ["vfat", "exfat", "ntfs", "ntfs3", "fuseblk", "ext4", "ext3", "btrfs"];
+
+    content
+        .lines()
+        .filter_map(|line| {
+            let parts: Vec<&str> = line.split_whitespace().collect();
+            if parts.len() < 3 {
+                return None;
+            }
+            let device = parts[0];
+            let mount_point = parts[1];
+            let fs_type = parts[2];
+
+            // Check if mount point is in a removable location
+            let is_removable = removable_prefixes
+                .iter()
+                .any(|prefix| mount_point.starts_with(prefix));
+
+            if !is_removable {
+                return None;
+            }
+
+            // Check filesystem type
+            if !removable_fs.contains(&fs_type) {
+                return None;
+            }
+
+            Some(MountInfo {
+                device: device.to_string(),
+                mount_point: PathBuf::from(mount_point),
+                fs_type: fs_type.to_string(),
+            })
+        })
+        .collect()
+}
+
+/// Check if a given path is located on a removable device.
+pub fn is_path_on_removable(path: &Path) -> bool {
+    let mounts = detect_removable_mounts();
+    mounts.iter().any(|m| path.starts_with(&m.mount_point))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_is_path_on_removable_with_no_mounts() {
+        // On a test system, /home paths shouldn't be on removable media
+        assert!(!is_path_on_removable(Path::new("/home/user/test.AppImage")));
+    }
+}
diff --git a/src/ui/app_card.rs b/src/ui/app_card.rs
index c88707e..71fdced 100644
--- a/src/ui/app_card.rs
+++ b/src/ui/app_card.rs
@@ -149,7 +149,12 @@ pub fn build_priority_badge(record: &AppImageRecord) -> Option<gtk::Label> {
         }
     }
 
-    // 3. Wayland issue (not Native or Unknown)
+    // 3. Portable / removable media
+    if record.is_portable {
+        return Some(widgets::status_badge("Portable", "info"));
+    }
+
+    // 4. Wayland issue (not Native or Unknown)
     if let Some(ref ws) = record.wayland_status {
         let status = WaylandStatus::from_str(ws);
         if status != WaylandStatus::Unknown && status != WaylandStatus::Native {
diff --git a/src/ui/detail_view.rs b/src/ui/detail_view.rs
index 6602aeb..05b7ab2 100644
--- a/src/ui/detail_view.rs
+++ b/src/ui/detail_view.rs
@@ -1800,6 +1800,22 @@ fn build_storage_tab(
         .build();
     size_group.add(&appimage_row);
 
+    if record.is_portable {
+        let location_label = if let Some(ref mp) = record.mount_point {
+            format!("Portable ({})", mp)
+        } else {
+            "Portable (removable media)".to_string()
+        };
+        let location_row = adw::ActionRow::builder()
+            .title("Location")
+            .subtitle(&location_label)
+            .build();
+        let badge = widgets::status_badge("Portable", "info");
+        badge.set_valign(gtk::Align::Center);
+        location_row.add_suffix(&badge);
+        size_group.add(&location_row);
+    }
+
     if !fp.paths.is_empty() {
         let categories = [
             ("Configuration", fp.config_size),
diff --git a/src/ui/preferences.rs b/src/ui/preferences.rs
index 64babc5..27fa269 100644
--- a/src/ui/preferences.rs
+++ b/src/ui/preferences.rs
@@ -265,6 +265,17 @@ fn build_behavior_page(settings: &gio::Settings) -> adw::PreferencesPage {
     });
     automation_group.add(&auto_integrate_row);
 
+    let removable_row = adw::SwitchRow::builder()
+        .title(&i18n("Watch removable media"))
+        .subtitle(&i18n("Scan USB drives and other removable media for AppImages"))
+        .active(settings.boolean("watch-removable-media"))
+        .build();
+    let settings_rem = settings.clone();
+    removable_row.connect_active_notify(move |row| {
+        settings_rem.set_boolean("watch-removable-media", row.is_active()).ok();
+    });
+    automation_group.add(&removable_row);
+
     page.add(&automation_group);
 
     // Backup group
diff --git a/src/window.rs b/src/window.rs
index f5ffe4b..f348270 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -1058,6 +1058,17 @@ impl DriftwoodWindow {
             dirs.push(system_dir.to_string());
         }
 
+        // Include removable media mount points if enabled
+        if settings.boolean("watch-removable-media") {
+            for mount in crate::core::portable::detect_removable_mounts() {
+                let mp = mount.mount_point.to_string_lossy().to_string();
+                if !dirs.iter().any(|d| d == &mp) {
+                    log::info!("Including removable mount: {} ({}, {})", mp, mount.device, mount.fs_type);
+                    dirs.push(mp);
+                }
+            }
+        }
+
         let toast_overlay = self.imp().toast_overlay.get().unwrap().clone();
         let window_weak = self.downgrade();
 
@@ -1121,6 +1132,15 @@ impl DriftwoodWindow {
                         new_count += 1;
                     }
 
+                    // Detect portable/removable media
+                    if crate::core::portable::is_path_on_removable(&d.path) {
+                        let mounts = crate::core::portable::detect_removable_mounts();
+                        let mount_point = mounts.iter()
+                            .find(|m| d.path.starts_with(&m.mount_point))
+                            .map(|m| m.mount_point.to_string_lossy().to_string());
+                        bg_db.set_portable(id, true, mount_point.as_deref()).ok();
+                    }
+
                     // Mark for background analysis
                     bg_db.update_analysis_status(id, "pending").ok();
                     needs_analysis.push((id, d.path.clone(), d.appimage_type.clone()));