Only FAT32 Can be accepted by Arm64 version and version is over 6.7 wim.install can’t be used – need to be splitted into 3 parts

Story: i once bought 64GB Flash Disk HP thought it will fix the work but has only NTFS and ExFat which is not supported by my Boss PC Arm64 new generation, remember to check supported FAT32 and only option availalbe is to download

dism /Split-Image /ImageFile:D:\sources\install.wim /SWMFile:E:\sources\install.swm /FileSize:3800

how can i force windows 11 amr64 to go on fat32 disk it says install.wim is too large

This happens because the install.wim file inside Windows 11 ARM64 is usually larger than 4 GB, and FAT32 cannot store files bigger than 4 GB. That’s why you get the error when trying to copy it to a FAT32 USB.

But you still have several ways to fix it 👇

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✅ Best Solution — Split install.wim into smaller files (Recommended)

You keep the USB as FAT32 (required for many ARM / UEFI devices like Snapdragon laptops), but split the big file.

Steps

1. Mount the Windows ISO
   • Right-click ISO → Mount
2. Open Command Prompt as Administrator
3. Run this command (change paths if needed):

dism /Split-Image /ImageFile:D:\sources\install.wim /SWMFile:E:\sources\install.swm /FileSize:3800

Explanation:

• D: = mounted ISO
• E: = your USB drive
• 3800 MB keeps files under FAT32 limit

After this you will get:

install.swm
install2.swm
install3.swm

Delete the original install.wim from USB if it exists.

Windows Setup automatically reads .swm files 👍

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✅ Alternative — Use NTFS (if device supports it)

Format USB as NTFS:

format E: /FS:NTFS /Q

But ⚠️ many ARM Snapdragon devices require FAT32 for boot, so this may fail.

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✅ Easiest Method — Use Rufus (Auto Fix)

Tool: Rufus

Steps:

1. Insert USB
2. Open Rufus
3. Select ISO
4. Start

Rufus automatically splits the WIM for you if needed.

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✅ Pro Method — Dual Partition USB (Advanced)

Create:

• Small FAT32 partition → boot files
• Large NTFS partition → install.wim

Useful for advanced deployments.

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⚠️ Important for Your Device (Lenovo Snapdragon)

Since you mentioned:

Lenovo IdeaPad Slim 3 Snapdragon

ARM Copilot PCs usually:

• Require UEFI + FAT32
• Do NOT boot from NTFS easily

So splitting WIM is safest.

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👍 Quick Recommendation for You

Just use:

👉 Rufus OR DISM split method

That will work perfectly.

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❓If you want

I can give you:

• Direct Windows 11 ARM64 ISO link
• Step-by-step for Lenovo Snapdragon recovery
• Or automatic script to split WIM

Just tell me 👍

Best Solution — Split install.wim into smaller files (Recommended) You keep the USB as FAT32 (required for many ARM / UEFI devices like Snapdragon laptops), but split the big file. Steps Mount the Windows ISO Right-click ISO → Mount Open Command Prompt as Administrator Run this command (change paths if needed): guide me

Perfect 👍 I’ll guide you step-by-step clearly.

This will allow your Windows 11 ARM64 USB (FAT32) to work on your Lenovo Snapdragon device.

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✅ STEP 1 — Mount the Windows 11 ARM64 ISO

1. Right-click the Windows 11 ARM64 ISO
2. Click Mount
3. A new drive will appear (example: D:)

👉 Remember that drive letter (example: D:)

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✅ STEP 2 — Prepare Your USB (FAT32)

1. Insert USB (8GB or bigger)
2. Open This PC
3. Right-click USB → Format
4. Choose:
   • File system → FAT32
   • Quick Format → ✔
5. Click Start

Assume your USB is E: (check yours!)

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✅ STEP 3 — Copy All Files Except install.wim

1. Open mounted ISO drive (D:)
2. Select all files
3. Copy everything to USB (E:)
4. Wait until copying finishes

⚠️ It will fail when copying:

sources\install.wim

That’s normal — skip it.

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✅ STEP 4 — Split install.wim (Important Part)

Now:

1. Click Start
2. Type: cmd
3. Right-click → Run as Administrator

Now type this command (replace letters if different):

dism /Split-Image /ImageFile:D:\sources\install.wim /SWMFile:E:\sources\install.swm /FileSize:3800

🔎 What this means:

• D: = your mounted ISO
• E: = your USB
• 3800 = size under 4GB limit

Press Enter

It will take 2–5 minutes.

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✅ STEP 5 — Verify

Go to:

USB → sources

You should now see:

install.swm
install2.swm
install3.swm

If yes ✅ your USB is ready.

Windows setup automatically reads these files.

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🎯 Done — You Can Now Install

1. Insert USB
2. Boot from USB (F12 or Novo button on Lenovo)
3. Install Windows normally