Storage & Files
Drive Capacity Calculator and Storage Converter
Compare a drive's advertised GB or TB with its binary equivalent. Add an optional reserved-space allowance. The result separates the unit conversion from the space you choose to set aside.
Storage Space Calculator
Estimate collection storage from the file count and your sampled average size. Add an allowance for growth or uncertainty. The result separates the base collection from the extra space.
USB Transfer Time Calculator
Estimate a USB file copy from its total size and sustained transfer rate. Optional port and drive limits identify the slowest stated component. Connector shape alone does not establish transfer speed.
SD Card Speed Class Checker
Read the minimum sequential write rating behind an SD or microSD speed-class symbol. Select the mark printed on the card, then compare the class family with the requirement in the device manual.
Windows Update Space Checker
Compare free space on the Windows system drive with the free-space target stated for a particular update. Enter figures from Windows or the relevant installation instructions; this page does not scan the drive.
Email Attachment Size and Base64 Calculator
Estimate attachment bytes after Base64 encoding and compare a modeled message with a known size limit. Enter file sizes or select local files for their size metadata. File contents are not read or uploaded, and no email is sent.
RAID Capacity Calculator
Calculate nominal capacity for RAID 0, 1, 5, 6 or 10 from the drive sizes entered. The model gives every member the smallest drive’s capacity. It separates unused size mismatch from capacity allocated to mirrors or parity; it does not inspect an array.
EXIF and Photo Metadata Viewer
Read selected embedded metadata from a local JPEG or TIFF file up to 20 MiB. The file is parsed in this browser without uploading it. Camera details and dates may be absent; GPS coordinates stay hidden until explicitly enabled and the file is read again.
CCTV and NVR Storage Calculator
Calculate CCTV and NVR recording storage from actual bitrate, camera count, recording schedule, audio and a separate disk-space reserve.
Camera Storage Calculator
Plan one shoot’s combined photo and video storage using measured photo sizes, video bitrate, recording time and an explicit allowance.
Guides
SD Card Labels: Speed Class, Bus Interface and A1/A2
UHS-I, U3, V30 and A2 can appear on the same card. They describe different parts of its specification: the bus interface, a sequential speed class and application performance. The capacity in GB is a separate figure.
Check File Sizes and EXIF Locally Before Sharing
Check the operation, size limit and exact file before sharing a photo or attachment.
Plan RAID Capacity, Mixed Drives and Separate Backups
Use an explicit drive ledger to separate usable space, redundancy, unused drive portions and a recoverable backup.
Plan Camera and NVR Storage from Measured Bitrates
Build a recording-storage plan from real file sizes, recording schedules and explicit reserves, then verify the history actually retained.