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Everbex BaaS Cloud Object Storage Calculator
for shared folders, CCTV and Microsoft 365 Backup

Everbex Cloud Storage Calculator helps you estimate the recommended backup storage size (usable and optional raw capacity) for three common workloads:

  1. Shared Folder (File server / NAS shares)

  2. CCTV Video (NVR or camera recordings based on bitrate)

  3. Microsoft 365 Backup (Exchange, OneDrive, SharePoint, Teams/Groups)

You can adjust your backup policy (retention, change rate, dedupe/compression factor, overhead, and buffer) to match your backup tool and environment. 


What this calculator estimates (simple explanation)

  • Shared Folder & Microsoft 365 are estimated using a practical backup chain model:
    1 Full + Daily Incrementals (based on daily change %) + optional Weekly/Monthly full restore points (GFS)

  • CCTV is estimated based on actual recording volume:
    Cameras × Bitrate × Hours/Day × Retention Days × Motion Factor

Then the calculator applies:

  • Reduction factor (compression/dedupe effect)

  • Overhead factor (metadata, indexes, restore point overhead)

  • Safety buffer (recommended spare capacity)

Optional:

  • Usable-to-raw factor to estimate raw disk required (useful when planning RAID / Erasure Coding).



Step 1 — Set the Global Backup Policy

In Global Backup Policy, define the default rules:

  • Daily retention (days): How many daily restore points to keep (e.g., 30 days)

  • Weekly retention (weeks) and Monthly retention (months): Optional long-term restore points (GFS)

  • Daily change rate (%): Estimated daily data change (typical: 1–3% for office files, can be higher for active systems)

  • Backup reduction factor: Estimated dedupe/compression result

    • Typical for files/M365: 0.50–0.80

    • CCTV usually: ~1.00 (video compresses poorly)

  • Overhead factor: Extra space for indexes/metadata (typical 1.03–1.10)

  • Storage safety buffer (%): Recommended spare capacity (typical 15–30%)

  • Usable-to-raw factor (optional):

    • If you only want usable result: 1.00

    • RAID6 example: 0.80

    • Erasure coding examples: 0.75 / 0.67

  • Display unit: GB or TB

Tip: If you’re unsure, start with defaults and adjust after you see the results.


Step 2 — Fill in each workload (enable what you need)

A) Shared Folder

  • Enable Include this workload

  • Enter Current data size (GB)

  • If this workload needs different retention/change rate, choose Override global policy and adjust.

✅ Best for: file servers, NAS shared folders, departmental shares.

B) CCTV Video

  • Enter Number of cameras

  • Enter Avg bitrate per camera (Mbps)

  • Enter Recording hours per day (24 if continuous)

  • Enter Retention (days) (how many days of recordings you want to keep)

  • Set Motion factor (%)

    • 100% = continuous record

    • 30–60% = motion record (depends on environment)

✅ Best for: estimating backup/archive size for video retention, DR copy, offsite copy.

C) Microsoft 365 Backup

  • Enter Users

  • Enter average sizes:

    • Mailbox size per user (GB)

    • OneDrive size per user (GB)

  • Add organization-level content:

    • SharePoint total (GB)

    • Teams/Groups content (GB)

  • If your M365 policy differs (often longer retention), choose Override global policy.

✅ Best for: M365 backup sizing (cloud-to-cloud or to object storage).

Step 3 — Click “Calculate”

The report will show:

  • Total Usable Recommended (includes buffer)

  • Total Raw Required (if usable-to-raw factor is not 1.00)

  • Largest Workload (helps you understand what drives the storage)

And a table with each workload:

  • Estimated base (no buffer)

  • Recommended (with buffer)

Step 4 — Export PDF (A4)

Click Export PDF (A4) to generate a print-ready report.

Example (quick scenario)

 company has:

  • Shared Folder: 2TB (2000GB), change rate 2%, retention 30 days, weekly 8, monthly 12

  • CCTV: 16 cameras, 4Mbps, 24 hours/day, retention 30 days

  • M365: 80 users, mailbox 8GB/user, OneDrive 20GB/user, SharePoint 300GB, Teams 150GB

After clicking Calculate, the report will provide a usable recommendation (and raw if ratio is selected), and you can export it as an A4 PDF and email to sales@everbex.com for proposal/quotation.

Everbex Cloud Storage Calculator

Everbex Cloud Storage Calculator

This calculator helps you estimate the recommended backup storage size (usable and optional raw capacity) for: Shared Folder, CCTV Video, and Microsoft 365 Backup. Adjust backup policy and export results to an A4 PDF report.

Inputs

Global Backup Policy

Workload A — Shared Folder

Include this workload

Model: 1 Full + Daily Incrementals (based on daily change %) + optional Weekly/Monthly restore points (GFS).

Workload B — CCTV Video

Include this workload

Model: Cameras × Bitrate × Hours/Day × Retention Days × Motion Factor.

Workload C — Microsoft 365 Backup

Include this workload

Model: Users×Mailbox + Users×OneDrive + SharePoint + Teams/Groups, then Full + Incrementals + optional GFS.

How this calculator estimates storage

Shared Folder & Microsoft 365

  • 1 Full + Daily Incrementals (based on daily change %)
  • Optional Weekly/Monthly restore points (GFS)
  • Then applies reduction factor, overhead, and buffer

CCTV Video

  • Cameras × Bitrate × Hours/Day × Retention Days × Motion Factor
  • Then applies overhead, reduction (if any), and buffer

Tips

  • CCTV reduction is usually close to 1.00 (video compresses poorly).
  • Buffer of 15–30% is common for growth and overhead.
  • Usable-to-raw factor helps estimate raw disks for RAID/EC planning.

Backup Storage Recommendation Report

Generated: -Unit: -Usable-to-raw: -
Total Usable Recommended
-
Includes buffer
Total Raw Required
-
Based on usable-to-raw ratio
Largest Workload
-
Helps choose tier/architecture
WorkloadInputsEstimated Base (no buffer)Recommended (with buffer)
Click Calculate to generate results.

Notes: This is an estimation model. Actual usage varies by dedupe/compression and backup chain behavior.