A file shared via a public link and an online bank statement do not pose the same security issue. Confusing these two needs, everyday sharing and sensitive archiving, often leads to choosing a single tool that poorly addresses both.
File storage and sharing solutions differ in their encryption architecture, access management, and retention model. These technical differences dictate the right choice far more than price or available space.
Client-side or server-side encryption: what it changes for your files
Most consumer cloud platforms encrypt data in transit (between your device and their servers) and at rest (on their disks). The provider then holds the decryption key. In the event of a breach in their infrastructure, your documents may be exposed.
End-to-end encryption works differently: the key remains on your device. The server stores an opaque block that it cannot read. Proton Drive or Tresorit apply this principle by default. Google Drive or OneDrive do not do this natively.
For everyday work files (presentations, drafts, vacation photos), server-side encryption is sufficient. For identity documents, signed contracts, or medical data, client-side encryption measurably reduces the attack surface. Comparisons that allow for a concrete evaluation of these differences can be found on muchos.org.
File sharing without an account: an underestimated criterion
Sharing a folder with an external provider or a client often assumes that the recipient creates an account on the same platform. This constraint hinders adoption and pushes users towards email attachments, with all their size and traceability limitations.
Several services allow you to share via a link accessible without registration: SwissTransfer, Smash, or even public links from Dropbox and Google Drive. The difference lies in the control you retain after sending.
- A public link without a password or expiration date remains accessible as long as you do not revoke it, which poses a risk if the URL circulates beyond the intended recipient.
- A password-protected link, with automatic expiration after a few days, limits the exposure window without complicating the download.
- Some platforms add an access log that records who opened the file and when, providing useful traceability in a professional context.
The choice depends on the recipient. For a regular collaborator, a permanent shared space is more practical. For a one-time send to a third party, a temporary transfer with expiration is more suitable.
Digital vault or cloud storage: adapting the tool to the level of sensitivity
A digital vault and a cloud storage service do not meet the same need, even though they both store files online. The digital vault is designed for archiving documents with probative value: pay slips, notarized acts, certificates. It ensures the integrity of the file over time and applies retention rules compliant with regulations.
A classic cloud storage (Google Drive, OneDrive, pCloud) is optimized for synchronization, collaborative editing, and quick sharing. It does not certify that a document has not been modified since its deposit.
Two tools rather than a single universal tool
Consolidating all your files into a single platform simplifies organization, but exposes sensitive documents to the same level of protection as innocuous files. A medical file mistakenly shared via a public Google Drive link has very different consequences from a vacation photo.
The separation does not need to be complex. It can be summarized in two simple rules: any document containing personal or contractual data goes into the encrypted digital vault, and everything else goes into collaborative cloud storage. This distinction avoids overpaying for a vault for files that do not need it and exposing sensitive documents in a space that is too open.
Consolidated platform or separate tools: reducing the attack surface
Multiplying services (a transfer tool, cloud storage, secure messaging, a web form) also multiplies the entry points for an attack. Each platform has its own password policies, its own potential vulnerabilities, and its own subcontracting conditions.
The recent trend has led some publishers to offer unified platforms covering sharing, secure transfer, and messaging. The advantage is concrete: a single set of permissions, a single audit log, a single encryption policy to verify. Security incidents that have occurred on managed transfer tools have reinforced this argument, especially in environments handling regulated data.
This consolidation comes at a cost. All-in-one platforms are generally more expensive than the sum of free services, and their interface may be heavier for light personal use. The choice thus depends on the volume of sensitive data handled and the number of people involved in the exchanges.
Data localization and GDPR compliance in cloud storage
Hosting your files with an American provider subjects the data to the Cloud Act, which allows U.S. authorities to request access to data stored by U.S. companies, even if the servers are in Europe. This point is often overlooked in consumer comparisons.
Players like Infomaniak kDrive or Leviia host data exclusively in Europe and position themselves on digital sovereignty. For an individual storing photos, localization has little practical impact. For a professional archiving client contracts or health data, the choice of hosting country can become a legal obligation.
Checking localization is not enough: it is also important to see if the provider uses subcontractors located outside the EU for technical support or data analysis, as this can create transfers outside the area covered by the GDPR.
The right reflex remains to clearly separate everyday files and sensitive documents, and then choose for each category a tool whose encryption architecture, sharing model, and localization correspond to the actual risk level. A single universal service simplifies organization, but two well-chosen tools better protect what really matters.