You can mount an Amazon S3 bucket as a virtual drive on a Windows server using a free, open-source tool called rclone. This allows you to interact with your S3 bucket like a local drive for file transfer, scripting, and application access.

This guide walks through installing the required components and mounting a bucket using explicit credentials and a bucket-scoped configuration.

Prerequisites

Windows Server with internet access
An S3 bucket
AWS access key and secret key with bucket permissions
PowerShell access
Administrator PowerShell recommended for install steps

Step 1 — Install WinFsp (required for mounting)

WinFsp provides the Windows filesystem driver used by rclone mount.

Run PowerShell as Administrator:

$api = "https://api.github.com/repos/winfsp/winfsp/releases/latest"
$release = Invoke-RestMethod $api
$asset = $release.assets | Where-Object { $_.name -match "winfsp-.*\.msi$" } | Select-Object -First 1
$msi = "$env:TEMP\$($asset.name)"

Invoke-WebRequest $asset.browser_download_url -OutFile $msi
Start-Process msiexec.exe -ArgumentList "/i `"$msi`" /qn /norestart" -Wait

Reboot after installation:

Restart-Computer

Step 2 — Download and Install rclone

$zipUrl = "https://downloads.rclone.org/rclone-current-windows-amd64.zip"
$zip = "$env:TEMP\rclone.zip"
$dst = "C:\rclone"

Invoke-WebRequest $zipUrl -OutFile $zip
Expand-Archive $zip -DestinationPath $env:TEMP -Force

$exe = Get-ChildItem $env:TEMP -Recurse -Filter rclone.exe | Select-Object -First 1
New-Item -ItemType Directory -Force -Path $dst | Out-Null
Copy-Item $exe.FullName "$dst\rclone.exe" -Force

$env:Path += ";$dst"
[Environment]::SetEnvironmentVariable("Path",$env:Path,"Machine")

Verify:

rclone version

Open a new PowerShell window if PATH has not refreshed.

Step 3 — Configure rclone S3 Remote

Create a remote using explicit credentials.

$RemoteName = "s3remote"
$Region     = "us-east-1"

rclone config create $RemoteName s3 `
  provider AWS `
  access_key_id YOUR_ACCESS_KEY `
  secret_access_key YOUR_SECRET_KEY `
  region $Region `
  env_auth false

Step 4 — Verify Bucket Access

Always reference the bucket path when testing.

$BucketName = "your-bucket-name"

rclone ls "${RemoteName}:$BucketName" --max-depth 1

Successful output confirms connectivity and permissions.

Step 5 — Create Bucket-Scoped Alias Remote

Create an alias remote that points directly to the bucket. This keeps all operations scoped to that bucket.

$AliasName = "s3bucket"

rclone config create $AliasName alias remote "${RemoteName}:$BucketName"

Verify:

rclone lsd "${AliasName}:"

Step 6 — Create Cache Directory

New-Item -ItemType Directory -Force -Path "C:\rclone-cache" | Out-Null

Step 7 — Mount the S3 Bucket as a Drive

Choose an unused drive letter (example: X:).

rclone mount "${AliasName}:" X: `
  --vfs-cache-mode writes `
  --cache-dir C:\rclone-cache `
  --dir-cache-time 10m `
  --poll-interval 1m `
  --attr-timeout 1m `
  --volname "S3Mount" `
  --log-level INFO `
  --log-file C:\rclone-mount.log

After the command succeeds, open File Explorer and navigate to the drive letter to view bucket contents.

The mount remains active while the PowerShell window stays open.

Step 8 — Optional: Mount Only a Prefix

To mount a specific folder inside the bucket:

rclone mount "${AliasName}:some/prefix" X: `
  --vfs-cache-mode writes `
  --cache-dir C:\rclone-cache

Step 9 — Make the Mount Persistent at Startup

Create a scheduled task that mounts the drive at system boot.

$action = New-ScheduledTaskAction -Execute "C:\rclone\rclone.exe" -Argument @"
mount s3bucket: X: --vfs-cache-mode writes --cache-dir C:\rclone-cache --dir-cache-time 10m --poll-interval 1m --attr-timeout 1m --log-level INFO --log-file C:\rclone-mount.log
"@

$trigger = New-ScheduledTaskTrigger -AtStartup
$principal = New-ScheduledTaskPrincipal -UserId "SYSTEM" -LogonType ServiceAccount -RunLevel Highest

Register-ScheduledTask -TaskName "RcloneS3Mount" -Action $action -Trigger $trigger -Principal $principal

Reboot and confirm the drive appears automatically.

How Do I Mount an S3 Bucket on Windows?