diff --git a/apps/obsidian-connector/src/main.ts b/apps/obsidian-connector/src/main.ts
index 1fd8eb06..af60c461 100644
--- a/apps/obsidian-connector/src/main.ts
+++ b/apps/obsidian-connector/src/main.ts
@@ -12,6 +12,8 @@ const DEFAULT_SETTINGS: SupermemorySettings = {
 	connectionId: "",
 	syncOnSave: true,
 	syncOnStartup: true,
+	syncMode: "all",
+	includedFolders: "",
 }
 
 export default class SupermemoryPlugin extends Plugin {
@@ -101,7 +103,9 @@ export default class SupermemoryPlugin extends Plugin {
 		if (!connectionId) return
 
 		if (!this.syncEngine) {
-			this.syncEngine = new SyncEngine(this.app, connectionId)
+			this.syncEngine = new SyncEngine(this.app, connectionId, this.settings)
+		} else {
+			this.syncEngine.updateSettings(this.settings)
 		}
 
 		await this.syncEngine.fullSync()
@@ -118,5 +122,6 @@ export default class SupermemoryPlugin extends Plugin {
 	async saveSettings() {
 		await this.saveData(this.settings)
 		configure(this.settings)
+		this.syncEngine?.updateSettings(this.settings)
 	}
 }
diff --git a/apps/obsidian-connector/src/settings.ts b/apps/obsidian-connector/src/settings.ts
index 3b1d8260..98af1e41 100644
--- a/apps/obsidian-connector/src/settings.ts
+++ b/apps/obsidian-connector/src/settings.ts
@@ -1,5 +1,6 @@
 import { App, PluginSettingTab, Setting } from "obsidian"
 import type SupermemoryPlugin from "./main"
+import type { SyncMode } from "./types"
 
 export class SupermemorySettingTab extends PluginSettingTab {
 	plugin: SupermemoryPlugin
@@ -39,5 +40,37 @@ export class SupermemorySettingTab extends PluginSettingTab {
 						await this.plugin.saveSettings()
 					}),
 			)
+
+		new Setting(containerEl)
+			.setName("Sync mode")
+			.setDesc("Which notes in your vault to sync to Supermemory.")
+			.addDropdown((dropdown) =>
+				dropdown
+					.addOption("all", "Entire vault")
+					.addOption("folders", "Only selected folders")
+					.setValue(this.plugin.settings.syncMode)
+					.onChange(async (value) => {
+						this.plugin.settings.syncMode = value as SyncMode
+						await this.plugin.saveSettings()
+						this.display()
+					}),
+			)
+
+		if (this.plugin.settings.syncMode === "folders") {
+			new Setting(containerEl)
+				.setName("Folders to sync")
+				.setDesc(
+					"Comma-separated folder paths (e.g. Projects, Daily). Subfolders are included.",
+				)
+				.addText((text) =>
+					text
+						.setPlaceholder("Projects, Daily")
+						.setValue(this.plugin.settings.includedFolders)
+						.onChange(async (value) => {
+							this.plugin.settings.includedFolders = value
+							await this.plugin.saveSettings()
+						}),
+				)
+		}
 	}
 }
diff --git a/apps/obsidian-connector/src/sync.ts b/apps/obsidian-connector/src/sync.ts
index aca97971..dca4e0a1 100644
--- a/apps/obsidian-connector/src/sync.ts
+++ b/apps/obsidian-connector/src/sync.ts
@@ -1,5 +1,6 @@
-import { type App, Notice, TFile, parseFrontMatterEntry, parseFrontMatterTags } from "obsidian"
+import { type App, Notice, TFile, parseFrontMatterTags } from "obsidian"
 import { pushDeletions, pushNotes, type NotePayload } from "./api"
+import type { SupermemorySettings } from "./types"
 
 const BATCH_SIZE = 50
 const DEBOUNCE_MS = 3000
@@ -12,13 +13,41 @@ interface SyncState {
 export class SyncEngine {
 	private app: App
 	private connectionId: string
+	private settings: SupermemorySettings
 	private state: SyncState = { syncing: false, lastFullSync: 0 }
 	private pendingChanges: Map<string, "upsert" | "delete"> = new Map()
 	private debounceTimer: ReturnType<typeof setTimeout> | null = null
 
-	constructor(app: App, connectionId: string) {
+	constructor(app: App, connectionId: string, settings: SupermemorySettings) {
 		this.app = app
 		this.connectionId = connectionId
+		this.settings = settings
+	}
+
+	updateSettings(settings: SupermemorySettings) {
+		this.settings = settings
+	}
+
+	private shouldSync(file: TFile): boolean {
+		if (file.extension !== "md") return false
+
+		const mode = this.settings.syncMode
+		if (mode === "all") return true
+
+		if (mode === "folders") {
+			const folders = this.settings.includedFolders
+				.split(",")
+				.map((f) => f.trim().replace(/^\/+|\/+$/g, ""))
+				.filter((f) => f.length > 0)
+			if (folders.length === 0) return false
+			return folders.some(
+				(folder) =>
+					file.path === `${folder}.md` ||
+					file.path.startsWith(`${folder}/`),
+			)
+		}
+
+		return false
 	}
 
 	async fullSync(): Promise<{ queued: number; failed: number }> {
@@ -32,7 +61,9 @@ export class SyncEngine {
 		let totalFailed = 0
 
 		try {
-			const files = this.app.vault.getMarkdownFiles()
+			const files = this.app.vault
+				.getMarkdownFiles()
+				.filter((f) => this.shouldSync(f))
 			const batches = this.chunk(files, BATCH_SIZE)
 
 			for (const batch of batches) {
@@ -60,13 +91,16 @@ export class SyncEngine {
 	}
 
 	onFileChange(file: TFile) {
-		if (!(file instanceof TFile) || file.extension !== "md") return
+		if (!(file instanceof TFile) || !this.shouldSync(file)) return
 		this.pendingChanges.set(file.path, "upsert")
 		this.schedulePush()
 	}
 
 	onFileDelete(file: TFile) {
 		if (!(file instanceof TFile) || file.extension !== "md") return
+		// Always allow deletes through (file may have been previously synced
+		// before its folder was excluded). The server safely no-ops on unknown
+		// customIds.
 		this.pendingChanges.set(file.path, "delete")
 		this.schedulePush()
 	}
@@ -74,7 +108,9 @@ export class SyncEngine {
 	onFileRename(file: TFile, oldPath: string) {
 		if (!(file instanceof TFile) || file.extension !== "md") return
 		this.pendingChanges.set(oldPath, "delete")
-		this.pendingChanges.set(file.path, "upsert")
+		if (this.shouldSync(file)) {
+			this.pendingChanges.set(file.path, "upsert")
+		}
 		this.schedulePush()
 	}
 
diff --git a/apps/obsidian-connector/src/types.ts b/apps/obsidian-connector/src/types.ts
index 360dbc37..914bf94a 100644
--- a/apps/obsidian-connector/src/types.ts
+++ b/apps/obsidian-connector/src/types.ts
@@ -1,3 +1,5 @@
+export type SyncMode = "all" | "folders"
+
 export interface SupermemorySettings {
 	apiKey: string
 	apiBaseUrl: string
@@ -6,4 +8,7 @@ export interface SupermemorySettings {
 	connectionId: string
 	syncOnSave: boolean
 	syncOnStartup: boolean
+	syncMode: SyncMode
+	/** Comma-separated folder paths; only used when syncMode === "folders" */
+	includedFolders: string
 }