diff --git a/HOSTING.md b/HOSTING.md
index 7479c14..fe4fae4 100644
--- a/HOSTING.md
+++ b/HOSTING.md
@@ -131,7 +131,7 @@ Give participants:
 - **Windows:** `irm https://git.mivanchenko.de/mivanchenko/mc-lan-party/raw/branch/main/install.ps1 | iex`
 - **Linux / macOS:** `curl -fsSL https://git.mivanchenko.de/mivanchenko/mc-lan-party/raw/branch/main/install.sh | bash`
 
-Each script asks for a nickname, derives a stable offline-mode UUID from it (so the same name = same player data across the whole 3-day party, even if they re-run the script), seeds that into a fresh `accounts.json`, downloads Fjord Launcher Unlocked from GitHub and the modpack from `https://minecraft.mivanchenko.de/modpack.zip`, and launches straight into the instance already connected to the same server.
+On Windows, `install.ps1` first asks which local drive to install to (Enter keeps the old default, `%USERPROFILE%\mc-lan-party`; any other drive installs to `<drive>:\mc-lan-party`). Each script then asks for a nickname, derives a stable offline-mode UUID from it (so the same name = same player data across the whole 3-day party, even if they re-run the script), seeds that into a fresh `accounts.json`, downloads Fjord Launcher Unlocked from GitHub and the modpack from `https://minecraft.mivanchenko.de/modpack.zip`, and launches straight into the instance already connected to the same server.
 
 Make sure your Minecraft server itself is running with `online-mode=false` in `server.properties` — offline accounts only work against offline-mode servers.
 
diff --git a/install.ps1 b/install.ps1
index 6feed21..d03c5c0 100644
--- a/install.ps1
+++ b/install.ps1
@@ -14,7 +14,40 @@ $ServerAddr   = "minecraft.mivanchenko.de:25565"  # always-on homelab box, same
 
 $ErrorActionPreference = "Stop"  # fail loudly instead of printing an error and silently continuing
 
-$InstallDir = Join-Path $env:USERPROFILE "mc-lan-party"
+# ---- pick the install drive (default: the system drive, under the user profile like before) ----
+$SystemDrive = $env:SystemDrive  # e.g. "C:"
+$Drives = @(Get-CimInstance Win32_LogicalDisk -Filter "DriveType=3" | Sort-Object DeviceID)  # local fixed disks only
+Write-Host "Where should the LAN party Minecraft be installed? (needs ~3 GB)"
+for ($i = 0; $i -lt $Drives.Count; $i++) {
+    $d = $Drives[$i]
+    $free = [math]::Round($d.FreeSpace / 1GB, 1)
+    $label = if ($d.VolumeName) { " ($($d.VolumeName))" } else { "" }
+    $default = if ($d.DeviceID -eq $SystemDrive) { "  [default]" } else { "" }
+    Write-Host ("  {0}) {1}{2} - {3} GB free{4}" -f ($i + 1), $d.DeviceID, $label, $free, $default)
+}
+$DriveChoice = $null
+while (-not $DriveChoice) {
+    $answer = Read-Host "Drive number or letter [$SystemDrive]"
+    if ([string]::IsNullOrWhiteSpace($answer)) { $answer = $SystemDrive }
+    $answer = $answer.Trim()
+    if ($answer -match '^\d+$' -and [int]$answer -ge 1 -and [int]$answer -le $Drives.Count) {
+        $DriveChoice = $Drives[[int]$answer - 1]
+    } else {
+        $letter = $answer.TrimEnd(':', '\').ToUpper() + ":"
+        $DriveChoice = $Drives | Where-Object { $_.DeviceID -eq $letter } | Select-Object -First 1
+    }
+    if (-not $DriveChoice) { Write-Host "    '$answer' is not one of the drives above, try again." -ForegroundColor Yellow }
+}
+if ($DriveChoice.FreeSpace -lt 3GB) {
+    Write-Host "==> Warning: only $([math]::Round($DriveChoice.FreeSpace / 1GB, 1)) GB free on $($DriveChoice.DeviceID), the install may run out of space." -ForegroundColor Yellow
+}
+
+# System drive keeps the old location so existing installs are found again; other drives get a top-level folder
+if ($DriveChoice.DeviceID -eq $SystemDrive) {
+    $InstallDir = Join-Path $env:USERPROFILE "mc-lan-party"
+} else {
+    $InstallDir = Join-Path "$($DriveChoice.DeviceID)\" "mc-lan-party"
+}
 New-Item -ItemType Directory -Force -Path $InstallDir | Out-Null
 Set-Location $InstallDir