Share a folder with a defined purpose
A local share can avoid passing USB sticks between two computers that exchange files regularly. Start with a dedicated folder for that purpose. Sharing an entire personal user folder is usually unnecessary. A clearly bounded exchange folder makes it easier to understand what other devices can reach.
Decide who needs to read and who needs to change files before configuring access. Read-only access may be enough for documents being distributed. A shared drop-off area needs writing rights, but those can also create opportunities to overwrite or delete material. The intended collaboration should determine the permissions, rather than the convenience of choosing the most open option.
Use the appropriate network context
Set this up on a trusted local network. Windows distinguishes public and private network profiles, among other settings. A private profile can support local discovery and sharing, but should not be applied indiscriminately to unfamiliar Wi-Fi. Changing a label does not turn a hotel network into your home network.
Check that both devices are on a network that permits communication between them. A guest network may isolate clients from each other or from the main household network. Both computers reaching the internet does not prove they can use a local share. Preserve deliberate isolation rather than removing it merely to make a transfer convenient.
Consider identity and permissions together
A shared folder can have both sharing permissions and file-system permissions. If someone can see a folder but cannot open or save a file, inspect both layers. Do not broadly increase access for everyone on speculation. Use the intended accounts and keep passwords out of public notes or shared documents.
Test from the second computer with a disposable file. Can the intended account read it? Can it write only where that is required? Where appropriate, also try an account that should have no access. A successful visit from your own administrator account does not answer those questions.
The application determines whether simultaneous editing is supported. Placing an ordinary file in a network folder does not turn it into a collaborative document. Two people opening and saving separate changes can create conflicts. Agree on a working process or choose software explicitly supporting the collaboration you need.
Availability is part of the arrangement
A folder shared from a desktop becomes unavailable when that computer is off or loses its connection. Include that dependency if the folder will be used regularly. Dedicated network storage can fill a different role, but still requires maintenance and backups.
Shared files need a backup too. The share itself is not another copy, and additional users introduce additional opportunities for accidental changes. Check that the exchange folder is included in the backup and that older versions can be restored. Remove unused shares deliberately when their purpose ends instead of leaving a one-off transfer arrangement open indefinitely.
An example with separate jobs
Suppose a household wants to read bills together while keeping individual drafts private. That does not require one large folder writable by everyone. A folder of finished documents can be read-only, while a separate exchange folder accepts new material. Private drafts remain outside both shares. The arrangement follows the actual purpose and reduces opportunities to change completed documents accidentally.
Try the entire workflow: one person places a copy in the exchange folder and the other opens it from their own computer. Then check that editing works where intended and is blocked in the protected location. Use invented test material. If access fails, record the account name, shared path and exact error, but not the password. Establish that small arrangement before adding more folders.
Do not expose a local share to the internet through an improvised router port-forwarding rule. Remote access is a separate task with additional authentication and security requirements. Choose a service intended for that purpose if occasional access from outside the home is needed. A successful test on the home network is not a test of a public remote-access arrangement.
Finally, record which computer actually stores the files. A linked folder on the second device can look local even though the data still lives only on the first. That distinction matters when either computer is replaced or reinstalled.
