Download the complete high-resolution gallery first.
Download every high-resolution file while the gallery is active, keep the delivered filenames intact, and confirm that several photographs open at full size. Social-size files and screenshots are useful for sharing, but they are not the printable originals and should not become the permanent archive.
Buy storage with room to grow.
Buy one external SSD or hard drive with at least twice the space required by the complete download, plus a cloud-backup plan large enough to hold the same folder. A second external drive can supplement or replace the cloud copy only if it lives somewhere else. Check the connector your computer uses and include any cable or adapter you will need before the gallery download begins.
Use a practical three-copy plan.
Keep the photographs on a computer or primary drive, on an independent external drive, and in a reputable cloud-backup service or another off-site location. Three folders on the same device are still one copy. Two devices in the same house are vulnerable to the same theft, fire, water, or electrical event.
Know the difference between sync and backup.
A service that instantly mirrors every deletion or corrupted file may keep devices synchronized without preserving earlier versions. Choose an off-site service with file history or recovery, protect the account with a unique password and multi-factor authentication, and understand how long deleted files remain recoverable.
Verify the copies instead of trusting the drive light.
Open files from each destination, compare the number and total size of the copied files, and safely eject external drives. Keep one drive disconnected when it is not being updated. A copy is only useful after it has been checked and can be restored without the original computer.
Label the archive for the future.
A drive that seems obvious now may look disposable in ten years. Use clear folder names, dates, both names, and a physical label that says the files are wedding photographs and should not be erased.
Review the archive once a year and after every technology change.
External drives fail, cloud accounts lapse, and computers are replaced. Once a year, connect the offline copy, open a selection of files, confirm the cloud account is current, and replace aging media. Repeat the check before recycling a computer, changing a family email address, or closing a storage account.
Make physical photographs.
An album, print box, and framed photographs do not replace digital backups, but they protect the work from forgotten passwords, obsolete services, and files nobody remembers to open.
