System (C:)

C: almost full · 12 GB free

Data (D:)

D: lots free · 180 GB free

C: after

Same disk

C: roomier after expand

D: free space → grow C:

Same physical disk only; back up important data first

* Unsupported layouts (cross-disk, locked BitLocker, …) are greyed out with a reason

Key Features

Simple, stable, hassle-free. Small, clean, and ad-free.

Same-disk expand

Move free space from D: (or another data partition) to grow C: — files kept, capacities trade off.

Guided expand

Heavy moves run in a guided restart environment so open apps don’t block the volume.

Preflight checks

Unsupported layouts are greyed out with a clear reason — no forced risky runs.

Small, Clean & Ad-free

Focused tool, clean UI, no ads or bundled junk.

Free expand quota

Try with a free capacity quota; buy once for unlimited expand count & size on this PC.

Buy once

One lifetime price — no monthly or yearly plans.

Resume-friendly

Where possible, pause and continue later instead of starting from zero.

Email support & updates

Paid license includes email support and ongoing feature updates.

Pricing

One lifetime price — no monthly or yearly plans. Free expand quota in the app; buy once for unlimited expand count & size.

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Buying once does not mean no support: every plan (including the trial) includes email support and ongoing feature updates. Email support@scsoi.com for issues — we investigate and fix; paid users get free upgrades.

Download

ScsExpand for Windows …

Requirements: Windows 10 / 11 (64-bit)
Portable is a zip (extract and run). Setup is an .exe installer.
Globally stable download, fast from anywhere in the world.

Portable (recommended)

Official GitHub

unzip and run

Installer

Official GitHub

classic setup

同系列相关工具

和 ScsExpand 一样来自 SCSOI。一句话分清用途：

SCSOI · 网盘挂载

ScsDrive

把 网盘 / WebDAV 挂载成 Windows 真实本地硬盘——像本地盘一样打开云端文件。

打开 ScsDrive

SCSOI · 本机盘符

ScsSubst

把 本机文件夹 变成盘符——路径更短、更好记，不是网盘挂载。

打开 ScsSubst

FAQ

Did not find your answer? Email us at support@scsoi.com.

How is ScsExpand different from ScsDrive / ScsSubst?

ScsExpand expands C: by moving free space on the same disk. ScsDrive mounts cloud/WebDAV as a real local disk. ScsSubst turns a local folder into a drive letter.

What is the difference between trial and licensed versions?

Same features. The trial is 7 days; start it with a friend’s invite code and it becomes 14. When someone starts a trial with your code, you also gain 7 days, with no cap. Lifetime licenses don’t add days. After the trial, buy a license to keep using it.

How do I get support?

Email support@scsoi.com. Lifetime and subscription licenses both include ongoing email support and feature updates — buying once does not end support.

How do I use ScsExpand as a safer AI workspace?

Make an AI-only folder, map it to a drive letter, and point the AI/agent workspace there. Accidental deletes stay on that drive. Note: the tool must use that drive as its workspace — this is not an OS-level sandbox.

Do lifetime licenses still get email support and updates?

Yes. Lifetime includes ongoing email support and feature updates (free upgrades), same as subscribers — not buy-and-forget.

Contact Us

Business inquiries, feedback, purchase questions.

Email: support@scsoi.com

We read every email we receive.