Trying to send a 4GB installer or a huge backup?
Many platforms limit file size — or users struggle to download large files in one go.
Here’s how to split and rejoin large files safely.
✅ 1. Use 7-Zip to split files
Steps:
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Right-click file → 7-Zip → Add to Archive
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Set format:
.7z -
Set “Split to volumes” size (e.g.,
700M,1000M)
✅ Creates files like:
✅ 2. Upload parts to cloud or web
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Share each part separately
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Works well on Google Drive, Dropbox, or FTP
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Users only need to download one part at a time
✅ 3. Provide clear instructions to users
Include a README.txt:
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Explains how to use 7-Zip to extract
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Warns not to rename parts
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Includes download order
✅ Reduces user confusion.
✅ 4. Use checksum hashes for verification
Provide:
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SHA256 or MD5 for each part
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Optional: Combined archive hash after extraction
✅ 5. Rejoin with 7-Zip or WinRAR
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User downloads all parts
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Opens
.001with 7-Zip → Extract -
Other parts combine automatically
Key points to remember
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Splitting avoids file size limits
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Works on email, web, or slow connections
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Add instructions and checksums for user trust
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Free tools like 7-Zip make the process easy