Backups
Part of Small business data storage
Choosing storage capacity from actual file growth
Measure current file use, forecast growth over a useful period and check what a storage plan counts before choosing capacity.
Choose capacity from measured use and a forecast over a stated period. Start with space used now, estimate net growth and allow for known projects and uncertainty. Check how the proposed service counts versions and deleted items before comparing the forecast with its limit.
Measure the locations that matter
For each location holding working files—shared libraries, individual work accounts, network storage and specialist applications with their own allowance—record used space and its applicable limit. Laptop free space and a cloud quota are different limits; do not add one to the other.
Record dated readings across several normal periods and, if possible, one busy period. Note what caused any jump, such as a media project, export or migration. One reading sets a baseline; later readings show whether use is growing.
Record / Why it matters
- Location and applicable limit
- Identifies where work could run out of space
- Used space and date
- Provides a comparable baseline
- Large or unusual work
- Separates recurring growth from one-off events
- Versions and deleted items
- Helps explain the provider’s usage figure
- Owner and next review
- Assigns the capacity decision
Provider accounting differs. In SharePoint in Microsoft 365, version-history settings affect storage use and restore options. Microsoft also says its SharePoint storage usage view may omit changes from the previous 24–48 hours. These behaviours are SharePoint-specific; use the usage view and terms for the exact service being assessed.
Forecast a decision period
Choose a horizon that matches a contract renewal, project cycle or equipment decision. Calculate:
Forecast use = current used space + expected monthly net growth × number of months + known one-off additions.
For illustration only, a workspace using 240 GB and growing by 15 GB each month would reach 420 GB after 12 months if that pace continued and no one-off change occurred. Use one unit throughout. Set any extra allowance from the business’s uncertainty and upcoming work; no universal percentage exists.
Do not project a one-off archive import every month. Do not count a temporary export as continuing growth if it will be removed under the business’s records process. Planned changes in staff, scanning, video, design files or retention may make the historical rate a poor forecast.
Compare the forecast with the offer
Ask which allowance applies to shared space and which to individual accounts. Check whether versions, deleted items or other services count towards it, when usage updates, what happens at the limit and how capacity can be increased. Confirm the current plan and terms rather than relying on a headline allowance.
Do not delete needed records or reduce version history merely to fit a quota. Ask the records owner whether duplicates or obsolete exports can safely go. Keep backup capacity separate from working-storage capacity, and review the forecast when actual use differs from its assumptions.
