diff --git a/src/vs/workbench/services/userData/common/fileUserDataProvider.ts b/src/vs/workbench/services/userData/common/fileUserDataProvider.ts
index 9138dfc2d337d1864949f8039a8af3219146f172..64a6fa47cf46555adb0614f790284edb45b9df0d 100644
--- a/src/vs/workbench/services/userData/common/fileUserDataProvider.ts
+++ b/src/vs/workbench/services/userData/common/fileUserDataProvider.ts
@@ -7,13 +7,13 @@ import { Event, Emitter } from 'vs/base/common/event';
 import { Disposable, IDisposable } from 'vs/base/common/lifecycle';
 import { IFileSystemProviderWithFileReadWriteCapability, IFileChange, IWatchOptions, IStat, FileOverwriteOptions, FileType, FileWriteOptions, FileDeleteOptions, FileSystemProviderCapabilities, IFileSystemProviderWithOpenReadWriteCloseCapability, FileOpenOptions, hasReadWriteCapability, hasOpenReadWriteCloseCapability, IFileSystemProviderWithFileReadStreamCapability, FileReadStreamOptions, hasFileReadStreamCapability } from 'vs/platform/files/common/files';
 import { URI } from 'vs/base/common/uri';
-import { extUriBiasedIgnorePathCase as resources } from 'vs/base/common/resources';
 import { startsWith } from 'vs/base/common/strings';
 import { BACKUPS } from 'vs/platform/environment/common/environment';
 import { IWorkbenchEnvironmentService } from 'vs/workbench/services/environment/common/environmentService';
 import { CancellationToken } from 'vs/base/common/cancellation';
 import { ReadableStreamEvents } from 'vs/base/common/stream';
 import { ILogService } from 'vs/platform/log/common/log';
+import { ExtUri, extUri, extUriIgnorePathCase } from 'vs/base/common/resources';
 
 export class FileUserDataProvider extends Disposable implements
 	IFileSystemProviderWithFileReadWriteCapability,
@@ -27,6 +27,7 @@ export class FileUserDataProvider extends Disposable implements
 	readonly onDidChangeFile: Event<readonly IFileChange[]> = this._onDidChangeFile.event;
 
 	private readonly userDataHome: URI;
+	private readonly extUri: ExtUri;
 
 	constructor(
 		private readonly fileSystemUserDataHome: URI,
@@ -39,6 +40,9 @@ export class FileUserDataProvider extends Disposable implements
 
 		this.userDataHome = environmentService.userRoamingDataHome;
 
+		this.extUri = !!(this.capabilities & FileSystemProviderCapabilities.PathCaseSensitive) ? extUri : extUriIgnorePathCase;
+		// Not required to update extUri as capabilites will not change.
+
 		// Assumption: This path always exists
 		this._register(this.fileSystemProvider.watch(this.fileSystemUserDataHome, { recursive: false, excludes: [] }));
 		this._register(this.fileSystemProvider.onDidChangeFile(e => this.handleFileChanges(e)));
@@ -135,21 +139,21 @@ export class FileUserDataProvider extends Disposable implements
 	}
 
 	private toFileSystemResource(userDataResource: URI): URI {
-		const relativePath = resources.relativePath(this.userDataHome, userDataResource)!;
+		const relativePath = this.extUri.relativePath(this.userDataHome, userDataResource)!;
 		if (startsWith(relativePath, BACKUPS)) {
-			return resources.joinPath(resources.dirname(this.fileSystemBackupsHome), relativePath);
+			return this.extUri.joinPath(this.extUri.dirname(this.fileSystemBackupsHome), relativePath);
 		}
-		return resources.joinPath(this.fileSystemUserDataHome, relativePath);
+		return this.extUri.joinPath(this.fileSystemUserDataHome, relativePath);
 	}
 
 	private toUserDataResource(fileSystemResource: URI): URI | null {
-		if (resources.isEqualOrParent(fileSystemResource, this.fileSystemUserDataHome)) {
-			const relativePath = resources.relativePath(this.fileSystemUserDataHome, fileSystemResource);
-			return relativePath ? resources.joinPath(this.userDataHome, relativePath) : this.userDataHome;
+		if (this.extUri.isEqualOrParent(fileSystemResource, this.fileSystemUserDataHome)) {
+			const relativePath = this.extUri.relativePath(this.fileSystemUserDataHome, fileSystemResource);
+			return relativePath ? this.extUri.joinPath(this.userDataHome, relativePath) : this.userDataHome;
 		}
-		if (resources.isEqualOrParent(fileSystemResource, this.fileSystemBackupsHome)) {
-			const relativePath = resources.relativePath(this.fileSystemBackupsHome, fileSystemResource);
-			return relativePath ? resources.joinPath(this.userDataHome, BACKUPS, relativePath) : resources.joinPath(this.userDataHome, BACKUPS);
+		if (this.extUri.isEqualOrParent(fileSystemResource, this.fileSystemBackupsHome)) {
+			const relativePath = this.extUri.relativePath(this.fileSystemBackupsHome, fileSystemResource);
+			return relativePath ? this.extUri.joinPath(this.userDataHome, BACKUPS, relativePath) : this.extUri.joinPath(this.userDataHome, BACKUPS);
 		}
 		return null;
 	}