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To attach a file is to add it to an email or form submission so it goes along with your message. In most apps, select the paperclip or an “Attach” control, choose the file, and confirm its name appears before you send or submit.
What does it mean to attach a file?
An attachment is a file included with an email or webform submission. The recipient can usually open or download it separately from the message text. The exact control may be labeled “Attach,” “Add an attachment,” or “Add Attachments,” depending on the service.
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How to attach a file to an email
Gmail on a computer
- Open Gmail and select Compose.
- In the message window, click the paperclip attachment control.
- Choose the file on your computer and click Open.
- Wait for the upload to finish, then check that the filename appears in the draft before sending. If the upload fails, use Gmail’s attachment help to troubleshoot.
Outlook
In Outlook, start or open a message and use its attach control to browse for a file. Depending on the Outlook version, you may also be able to drag a file into the message. When attaching a cloud file, Outlook may offer a sharing link or an attached copy; available choices depend on the edition and account locations. See Microsoft’s instructions for Outlook attachments and pictures and Outlook on the web.
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How to attach a file to a webform
- Find the form’s file-upload or attachment control. It may be labeled “Choose file,” “Attach,” or something similar.
- Select the requested file and follow the form’s instructions to complete the upload.
- Before submitting, confirm the file is listed or otherwise shown as added to the form.
For example, Grants.gov documents an “Add Attachments” button in its webform workflow. Other forms may use different labels; follow the instructions shown on the form. See Grants.gov’s webform attachment steps.
#1 Best Overall
Sale
Lexar D40E 128GB Dual USB 3.2 Gen 1 Type-C Jump Drive, Champagne Silver
- USB-C 2-in-1 storage OTG: The Lexar JumpDrive Dual Drive D40E features USB Type-A and Type-C connectors in a slim, portable form factor for easy device compatibility
- Transfer speeds up to 100MB/s: Based on internal testing, performance may vary depending upon the host device, interface, and usage conditions. 1MB=1,000,000 bytes
- Plug and Play: Widely compatible with USB Type-C smartphones, tablets, laptops, Macs, and traditional Type-A devices, no software installation required. The 360° swivel design allows for easy switching between connectors without the hassle of losing a cap
- Durable & Compact: The Lexar D40E USB memory stick features a metal enclosure, withstands temperatures from 0° to 50° C (32°F to 122°F), and is lightweight at 26g with dimensions of 70.4 x 16.9 x 11.7mm
- Security & Warranty: Securely protects files using an advanced security software solution with 256-bit AES encryption. Backed by a Lexar 3-year limited warranty
Attachment copy or cloud link: what is the difference?
| Option | What the recipient gets | What to check |
|---|---|---|
| Attached copy | A separate file sent with the message. | Use this when the recipient should receive a copy they can open or download. |
| Cloud sharing link | A link to a file stored online, rather than a separate file copy. | Check that the recipient has permission to open it. Outlook’s available cloud options depend on the edition and account locations. |
Only choose between these options if your email app presents them. Microsoft describes both link and copy choices for cloud files in Outlook on the web.
Attachment or inline image?
An attached image is provided as a separate file for the recipient to open or download. An inline image is inserted into the message body so it appears alongside the text. Choose an attachment when the recipient needs the file itself; choose an inline image when it should be viewed in context in the email. Outlook supports both approaches, as described in Microsoft’s Outlook instructions.
Rank #2
SANDISK 128GB Ultra Flair, USB-A Flash Drive, Up to 150MB/s Read Speeds | USB Flash Drive, Up to 15x Faster than standard 2.0, Password Protection, Durable, Sleek Metal Casing, USB 3.0, Silver/Black
- High-speed USB 3.0 performance of up to 150MB/s(1) [(1) Write to drive up to 15x faster than standard USB 2.0 drives (4MB/s); varies by drive capacity. Up to 150MB/s read speed. USB 3.0 port required. Based on internal testing; performance may be lower depending on host device, usage conditions, and other factors; 1MB=1,000,000 bytes]
- Transfer a full-length movie in less than 30 seconds(2) [(2) Based on 1.2GB MPEG-4 video transfer with USB 3.0 host device. Results may vary based on host device, file attributes and other factors]
- Transfer to drive up to 15 times faster than standard USB 2.0 drives(1)
- Sleek, durable metal casing
- Easy-to-use password protection for your private files(3) [(3)Password protection uses 128-bit AES encryption and is supported by Windows 7, Windows 8, Windows 10, and Mac OS X v10.9 plus; Software download required for Mac, visit the SanDisk SecureAccess support page]
Why an attachment may not send
- The upload is incomplete or failed: Wait for the upload to finish and verify that the filename appears in the draft or form before sending.
- The file is too large: Gmail’s current help page states a 25 MB attachment limit for personal accounts. If the total attachment size exceeds that limit, Gmail says it removes the attachment and adds it as a Google Drive link. Work and school account limits are set by the Workspace administrator, so 25 MB is not a universal Gmail limit. See Google’s Gmail attachment guidance.
- The file type is blocked: Gmail blocks executable attachments, including files ending in
.exe, for security reasons. Restrictions vary by service and account; consult the service’s own help if a different file is rejected.
For files too large to send as traditional attachments, Outlook may offer OneDrive sharing, depending on the Outlook edition and the cloud locations available to the account.
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Bestseller No. 3
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Best Value
IMEASON Swivel Design 16GB USB Flash Drive with Keychain, USB 2.0 Portable Thumb Drive Memory Stick, FAT32 Format Flashdrive for Data Storage, Photos, Music, Files (Black, 16 GB)
- 【16GB Flash Drive】USB flash drives with 16GB capacity, meet your needs of daily use on work, school, home and travelling for photos, music, videos, files storage and transfer. IMEASON thumb drives can be used to store different files, easy to data backup.
- 【Metal Swivel Cap Design】USB thumb drive is metal swivel cover provides extra protection for the usb thumbdrive connector, no usb drive cap to lose; keychain design makes it easier to carry without worrying lose it.
- 【Wide Compatibility】USB drive supports Windows 7/8/10/11 / Vista / XP / Unix / 2000 / ME / NT Linux and Mac OS, also Supports USB 2.0 and 1.1 ports. USB Stick support TV, desktop, notebook computer, car, audio and other device. The USB Memory Stick is your great data storage and transfer companion with traveling and working.
- 【Easy to use】usb memory stick is plug and play without any software installation. Just simply plug the Flashdrive into the port of your USB-compatible devices such as computer, laptop to start data storage or transmission.
- 【What You Get】16 GB USB Flash Drive Thumb Drive, The default format of the usb storage flash drive is FAT32.
Rank #4
Sale
SIMMAX 32GB Memory Stick USB 2.0 Flash Drives Swivel Thumb Drive Pen Drive (32GB Purple)
- GOOD VALUE PACKAGE - 1 Pack 32GB Memory Stick USB 2.0 Flash Drives with great cost performance and high quality.
- BIG CAPACITY - The available capacity: 29.10GB-29.8GB, You can save the data of movies, music, photos, designs, programs, manuals, handouts in a high speed.Good performance in digital data storing, transferring and sharing with families, friends, workmates, clients and machines.
- EASY TO USE & PLUG AND WORK - Support windows 7 / 8 / 10 / Vista / XP / 2000 / ME / NT Linux and Mac OS, Compatible with USB2.0 and below.
- TWISTTURN DESIGN & EASY CARRY - The metal clip rotates 360° round the ABS plastic body which with rubber oil skin feeling finish. The capless design can avoid lossing of cap, and providing efficient protection to the USB port.
- WARRANTY & SUPPORT - SIMMAX logo is laser printed on the USB connector surface, our products are of good quality and we promise that any problem about the product within one year since you buy.
Rank #3
2 Pack 64GB USB Flash Drive USB 2.0 Thumb Drives Jump Drive Fold Storage Memory Stick Swivel Design - Black
- What You Get - 2 pack 64GB genuine USB 2.0 flash drives, 12-month warranty and lifetime friendly customer service
- Great for All Ages and Purposes – the thumb drives are suitable for storing digital data for school, business or daily usage. Apply to data storage of music, photos, movies and other files
- Easy to Use - Plug and play USB memory stick, no need to install any software. Support Windows 7 / 8 / 10 / Vista / XP / Unix / 2000 / ME / NT Linux and Mac OS, compatible with USB 2.0 and 1.1 ports
- Convenient Design - 360°metal swivel cap with matt surface and ring designed zip drive can protect USB connector, avoid to leave your fingerprint and easily attach to your key chain to avoid from losing and for easy carrying
- Brand Yourself - Brand the flash drive with your company's name and provide company's overview, policies, etc. to the newly joined employees or your customers
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