Case File USB Delivery for Law Firms: 4 Controls Before the Drive Leaves the Office
For a law-firm case bundle, the question is not 'how much can it hold' but 'can anyone prove the file left the office unaltered.' A password protects the contents; it does not prove the contents were never changed, and it does not prove the drive the client received is the one you shipped. The controls that matter are read-only mastering, a serial label, and a signed handover - applied in that order, before the drive leaves the building.
Why a Case Bundle Needs a Read-Only Master, Not Just a Password
A password asks the recipient to type something; it does nothing to stop a file from being edited, overwritten, or silently swapped before it is opened. A read-only master image, written once and locked at the controller level, means the exhibit folder cannot be changed on the drive at all. That distinction is what survives a challenge: if opposing counsel receives a drive that reads exactly as you sent it, the master image is your evidence. Build the master on a machine you control, verify the file hashes, then lock it - do not ship a writable drive and hope nobody edits it.
Choosing the Body for an Exhibit Drive
The body has to survive handling and label cleanly. A flat leather or metal shell takes a printed serial and a firm's name without the print rubbing off in a pouch, and it reads as a document carrier rather than a promo gift.
Avoid gimmick shapes for exhibit drives; the body should signal 'evidence,' not 'promotion.' Metal shells resist the wear of repeated insertion better than soft plastic, and a matte surface holds a laser-etched serial longer than a glossy one. The choice is about durability of the identifier, not about looks.
Preload Layout: One Master Folder, Numbered Exhibits, Two Levels Maximum
Keep the structure flat enough that a non-technical recipient never has to dig. One master folder, then numbered exhibit sub-folders (Exhibit_01, Exhibit_02), with no more than two levels of nesting. Name files with the exhibit number first so they sort in order, and include a single README that maps each file to its exhibit. A recipient who opens the drive and sees a clean, numbered list is more likely to trust the bundle - and less likely to call with a 'where is exhibit 4' question.
Serial Labels and a Signed Handover Sheet as the Chain-of-Custody Record
The serial label is what ties the physical drive to your records. Print a unique number on the shell and on the sleeve, and record it on a handover sheet that the recipient signs on delivery. The signed sheet is the document that proves the drive left your hands intact; without it, the read-only master stands alone and is easier to dispute. Keep the label visible without opening the drive, so the number can be checked against the sheet at any point in the matter.
The Three Controls That Make a Bundle Tamper-Evident
Each control closes a different gap. Read the table before you brief the factory, because all three have to be present for the bundle to hold up.
What to Write on the PO So the Factory Ships It Locked and Labelled
None of this happens unless the purchase order says it. Specify 'read-only master image, controller-locked, not writable,' list the exact folder structure, require a unique serial on shell and sleeve, and ask for a signed handover template to ship with each drive. State the quantity of labelled sets and the turnaround you need, and ask for one sample before the bulk run so you can verify the lock and the label yourself. Send your exhibit list and recipient count; we will quote a read-only preload run with serial labels, sample first and bulk after your sign-off.
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