diff --git a/src/symbols/exists.ts b/src/symbols/exists.ts
deleted file mode 100644
index 13a2a4e..0000000
--- a/src/symbols/exists.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-import fs from 'fs';
-
-export function exists(file: string): boolean {
-    try {
-        fs.accessSync(file);
-    } catch {
-        return false;
-    }
-
-    return true;
-}
\ No newline at end of file
diff --git a/src/symbols/s3-api-client/s3-api-client.spec.ts b/src/symbols/s3-api-client/s3-api-client.spec.ts
index 8923b02..f150428 100644
--- a/src/symbols/s3-api-client/s3-api-client.spec.ts
+++ b/src/symbols/s3-api-client/s3-api-client.spec.ts
@@ -1,46 +1,34 @@
-import * as ExistsModule from '../exists';
 import { S3ApiClient } from './s3-api-client';
 
 describe('S3ApiClient', () => {
     describe('uploadFileToPresignedUrl', () => {
-        let s3ApiClient;
-        let fakeReadStream;
+        let s3ApiClient: S3ApiClient;
         let fakeSuccessResponse;
         
         beforeEach(() => {
-            fakeReadStream = '🦦';
             fakeSuccessResponse = { status: 200 };
-            spyOn(ExistsModule, 'exists').and.returnValue(true);
             s3ApiClient = new S3ApiClient();
-            s3ApiClient._fs = jasmine.createSpyObj('fs', ['createReadStream']);
-            s3ApiClient._fs.createReadStream.and.returnValue(fakeReadStream);
-            s3ApiClient._fetch = jasmine.createSpy();
-            s3ApiClient._fetch.and.resolveTo(fakeSuccessResponse);
-        });
-
-        it('should throw if file does not exist', async () => {
-            const path = '/file/not/found';
-            (<jasmine.Spy>ExistsModule.exists).and.returnValue(false);
-            await expectAsync(s3ApiClient.uploadFileToPresignedUrl('url', path)).toBeRejectedWithError(`File does not exist at path: ${path}!`);
+            (s3ApiClient as any)._fetch = jasmine.createSpy();
+            (s3ApiClient as any)._fetch.and.resolveTo(fakeSuccessResponse);
         });
 
         it('should call fetch with presignedUrl', async () => {
             const url = 'https://bugsplat.com';
-            const path = '/some/fake/path';
+            const file = '🐛.txt' as any;
 
-            await s3ApiClient.uploadFileToPresignedUrl(url, path);
+            await s3ApiClient.uploadFileToPresignedUrl(url, file, 1);
 
-            expect(s3ApiClient._fetch).toHaveBeenCalledWith(url, jasmine.anything());
+            expect((s3ApiClient as any)._fetch).toHaveBeenCalledWith(url, jasmine.anything());
         });
 
         it('should call fetch with init containing method and headers', async () => {
             const url = 'https://bugsplat.com';
-            const path = '/some/fake/path';
+            const file = '🐛.txt' as any;
             const size = 1337;
 
-            await s3ApiClient.uploadFileToPresignedUrl(url, path, size);
+            await s3ApiClient.uploadFileToPresignedUrl(url, file, size);
 
-            expect(s3ApiClient._fetch).toHaveBeenCalledWith(
+            expect((s3ApiClient as any)._fetch).toHaveBeenCalledWith(
                 jasmine.anything(),
                 jasmine.objectContaining({
                     method: 'PUT',
@@ -48,17 +36,17 @@ describe('S3ApiClient', () => {
                         'content-type': 'application/octet-stream',
                         'content-length': `${size}`
                     },
-                    body: fakeReadStream
+                    body: file
                 })
             );
         });
 
         it('should return response', async () => {
             const url = 'https://bugsplat.com';
-            const path = '/some/fake/path';
+            const file = '🐛.txt' as any;
             const size = 1337;
 
-            const response = await s3ApiClient.uploadFileToPresignedUrl(url, path, size);
+            const response = await s3ApiClient.uploadFileToPresignedUrl(url, file, size);
 
             expect(response).toEqual(fakeSuccessResponse);
         });
@@ -66,11 +54,11 @@ describe('S3ApiClient', () => {
         describe('error', () => {
             it('should throw if response status is not 200', async () => {
                 const url = 'https://bugsplat.com';
-                const path = '/some/fake/path';
+                const file = '🐛.txt' as any;
                 const size = 1337;
-                s3ApiClient._fetch.and.resolveTo({ status: 500 });
+                (s3ApiClient as any)._fetch.and.resolveTo({ status: 500 });
 
-                await expectAsync(s3ApiClient.uploadFileToPresignedUrl(url, path, size)).toBeRejectedWithError(`Error uploading ${path} to presignedUrl`);
+                await expectAsync(s3ApiClient.uploadFileToPresignedUrl(url, file, size)).toBeRejectedWithError(`Error uploading to presignedUrl ${url}`);
             });
         });
     });
diff --git a/src/symbols/s3-api-client/s3-api-client.ts b/src/symbols/s3-api-client/s3-api-client.ts
index fe680e8..006a828 100644
--- a/src/symbols/s3-api-client/s3-api-client.ts
+++ b/src/symbols/s3-api-client/s3-api-client.ts
@@ -1,28 +1,21 @@
 import fetchPonyfill from 'fetch-ponyfill';
-import fs from 'fs';
-import { exists } from '../exists';
+import type fs from 'fs';
 
 export class S3ApiClient {
 
     private _fetch = fetchPonyfill().fetch;
-    private _fs = fs;
-
-    async uploadFileToPresignedUrl(presignedUrl: string, file: string, size: number): Promise<Response> {
-        if (!exists(file)) {
-            throw new Error(`File does not exist at path: ${file}!`);
-        }
-
+    async uploadFileToPresignedUrl(presignedUrl: string, file: File | fs.ReadStream, size: number): Promise<Response> {
         const response = await this._fetch(presignedUrl, {
             method: 'PUT',
             headers: {
                 'content-type': 'application/octet-stream',
                 'content-length': `${size}`
             },
-            body: <any>this._fs.createReadStream(file),
+            body: file as BodyInit
         });
 
         if (response.status !== 200) {
-            throw new Error(`Error uploading ${file} to presignedUrl`);
+            throw new Error(`Error uploading to presignedUrl ${presignedUrl}`);
         }
 
         return response;
diff --git a/src/symbols/symbols-api-client/symbols-api-client.e2e.ts b/src/symbols/symbols-api-client/symbols-api-client.e2e.ts
index b08c461..aa30449 100644
--- a/src/symbols/symbols-api-client/symbols-api-client.e2e.ts
+++ b/src/symbols/symbols-api-client/symbols-api-client.e2e.ts
@@ -1,3 +1,5 @@
+import fs from "fs";
+import path from 'path';
 import { config } from "../../../spec/config";
 import { BugSplatApiClient } from "../../common";
 import { SymbolsApiClient } from "./symbols-api-client";
@@ -32,7 +34,14 @@ describe('SymbolsApiClient', () => {
 
     describe('post', () => {
         it('should return 200 for post with valid database, application, version and files', async () => {
-            const file = './dist/cjs/index.js.map';
+            const filePath = './dist/cjs/index.js.map';
+            const name = path.basename(filePath);
+            const size = fs.statSync(filePath).size;
+            const file = {
+                name,
+                size,
+                file: fs.createReadStream(filePath)
+            };
             const response = await client.post(
                 database,
                 application,
diff --git a/src/symbols/symbols-api-client/symbols-api-client.spec.ts b/src/symbols/symbols-api-client/symbols-api-client.spec.ts
index a30190e..c8e6d74 100644
--- a/src/symbols/symbols-api-client/symbols-api-client.spec.ts
+++ b/src/symbols/symbols-api-client/symbols-api-client.spec.ts
@@ -3,7 +3,6 @@ import path from 'path';
 import { createFakeBugSplatApiClient } from '../../../spec/fakes/common/bugsplat-api-client';
 import { createFakeFormData } from '../../../spec/fakes/common/form-data';
 import { createFakeResponseBody } from '../../../spec/fakes/common/response';
-import * as ExistsModule from '../exists';
 import { SymbolsApiClient } from './symbols-api-client';
 import * as S3ApiClientModule from '../s3-api-client/s3-api-client';
 import { of } from 'rxjs';
@@ -87,22 +86,17 @@ describe('SymbolsApiClient', () => {
             let fakeS3ApiClient;
             let files;
             let result;
-            let stat;
-            let size;
             let timer;
 
             beforeEach(async () => {
-                files = ['file/📄'];
-                size = 1337;
-                stat = jasmine.createSpy();
-                stat.and.returnValue({ size });
+                files = [{
+                    name: '📄.sym',
+                    size: 1337
+                }];
                 timer = jasmine.createSpy();
                 timer.and.returnValue(of(0));
-                (<any>symbolsApiClient)._stat = stat;
                 (<any>symbolsApiClient)._timer = timer;
 
-                spyOn(ExistsModule, 'exists').and.returnValue(true);
-
                 fakeS3ApiClient = jasmine.createSpyObj('S3ApiClient', ['uploadFileToPresignedUrl']);
                 fakeS3ApiClient.uploadFileToPresignedUrl.and.resolveTo(fakeSuccessResponse);
                 spyOn(S3ApiClientModule, 'S3ApiClient').and.returnValue(fakeS3ApiClient);
@@ -115,23 +109,12 @@ describe('SymbolsApiClient', () => {
                 );
             });
 
-            it('should throw if file does not exist', async () => {
-                (<jasmine.Spy>ExistsModule.exists).and.returnValue(false);
-                
-                await expectAsync(symbolsApiClient.post(
-                    database,
-                    application,
-                    version,
-                    files
-                )).toBeRejectedWithError(`File does not exist at path: ${files[0]}!`);
-            });
-
             it('should append dbName, appName, appVersion, size and symFileName to FormData', () => {
                 expect(fakeFormData.append).toHaveBeenCalledWith('dbName', database);
                 expect(fakeFormData.append).toHaveBeenCalledWith('appName', application);
                 expect(fakeFormData.append).toHaveBeenCalledWith('appVersion', version);
-                expect(fakeFormData.append).toHaveBeenCalledWith('size', size.toString());
-                expect(fakeFormData.append).toHaveBeenCalledWith('symFileName', path.basename(files[0]));
+                expect(fakeFormData.append).toHaveBeenCalledWith('size', files[0].size.toString());
+                expect(fakeFormData.append).toHaveBeenCalledWith('symFileName', path.basename(files[0].name));
             });
 
             it('should call fetch with correct route', () => {
@@ -153,7 +136,7 @@ describe('SymbolsApiClient', () => {
             });
 
             it('should call uploadFileToPresignedUrl with url, file and size', () => {
-                expect(fakeS3ApiClient.uploadFileToPresignedUrl).toHaveBeenCalledWith(url, files[0], size);
+                expect(fakeS3ApiClient.uploadFileToPresignedUrl).toHaveBeenCalledWith(url, files[0].file, files[0].size);
             });
 
             it('should sleep between requests', () => {
@@ -176,7 +159,7 @@ describe('SymbolsApiClient', () => {
                         application,
                         version,
                         files
-                    )).toBeRejectedWithError(`Error getting presignedUrl for ${path.basename(files[0])}`);
+                    )).toBeRejectedWithError(`Error getting presignedUrl for ${files[0].name}`);
                 });
 
                 it('should throw if response json Status is \'Failed\'', async () => {
diff --git a/src/symbols/symbols-api-client/symbols-api-client.ts b/src/symbols/symbols-api-client/symbols-api-client.ts
index 565af5a..04cd75b 100644
--- a/src/symbols/symbols-api-client/symbols-api-client.ts
+++ b/src/symbols/symbols-api-client/symbols-api-client.ts
@@ -1,16 +1,12 @@
-import fs from 'fs';
-import path from 'path';
+import type fs from 'fs';
 import { lastValueFrom, timer } from 'rxjs';
-import util from 'util';
 import { ApiClient, BugSplatResponse } from '../../common';
-import { exists } from '../exists';
 import { S3ApiClient } from '../s3-api-client/s3-api-client';
-const stat = util.promisify(fs.stat);
 
 export class SymbolsApiClient {
 
     private readonly route = '/api/symbols';
-    private _stat = stat;
+
     private _timer = timer;
 
     constructor(private _client: ApiClient) { }
@@ -45,17 +41,12 @@ export class SymbolsApiClient {
         database: string,
         application: string,
         version: string,
-        files: Array<string>
+        files: Array<{ name: string, size: number, file: File | fs.ReadStream }>
     ): Promise<Array<BugSplatResponse>> {
         const promises = files
             .map(async (file) => {
-                if (!exists(file)) {
-                    throw new Error(`File does not exist at path: ${file}!`);
-                }
-                
-                const stats = await this._stat(file);
-                const size = stats.size;
-                const name = path.basename(file);
+                const name = file.name;
+                const size = file.size;
                 const presignedUrl = await this.getPresignedUrl(
                     database,
                     application,
@@ -65,7 +56,7 @@ export class SymbolsApiClient {
                 );
     
                 const s3Client = new S3ApiClient();
-                const response = s3Client.uploadFileToPresignedUrl(presignedUrl, file, size);
+                const response = s3Client.uploadFileToPresignedUrl(presignedUrl, file.file, size);
                 await lastValueFrom(this._timer(1000));
 
                 return response;